Q&A Hero

Q: As you go higher and higher above the surface of the earth, the mass of a body __________.

Q: As you go higher and higher above the surface of the earth, the weight of a body __________.

Q: You are holding your physics book, pushing upwards on it with the palm of your hand. The reaction to the weight of the book is the force on __________ by __________.

Q: You are holding your physics book, pushing upwards on it with the palm of your hand. The reaction to this force is the force on __________ by __________.

Q: You can tell whether a projectile is going upwards or downwards from the sign of __________.

Q: You throw a ball straight up. As the ball is going up, the direction of the velocity and acceleration point __________.

Q: You drop a freely falling body at the equator and at the north pole. The acceleration of the freely falling body at the equator is _______________ the acceleration of the freely falling body at the north pole.

Q: A high performance aircraft is executing a tight turn at 135 m/s. The radius of the curve is 750 m. What is the aircraft's acceleration?

Q: A "˜cliff diver" in Mexico dives off a high cliff and falls for 2.3 seconds before hitting the water./ (a) How fast is the diver going at impact? (b) How far below the cliff is the diver at this point?

Q: A race car goes around a curve at 50 m/s. The radius of the curve is 400 m. What is the car's acceleration?

Q: The acceleration of a ball as it rolls down a ramp is 3 m/s2. It starts from rest. (a) What is the ball's speed after 4 seconds? (b) How far does the ball travel during the 4 seconds?

Q: During takeoff a jet aircraft goes from 0 m/s to 60 m/s in 5 seconds. (a) What is the jet's acceleration? (b) What is the jet's speed after 22 seconds?

Q: A runner in a race takes 2.7 seconds to go from the 40 meter mark to the 70 meter mark. (a) What is the runner's speed? (b) How far would the runner go in 8 seconds if this speed is maintained? (c) How long did it take the runner to cover the first 40 m (assuming the same speed was maintained)?

Q: Devil's Tower National Monument is 1280 ft high. Convert this height to meters.

Q: The Gateway Arch in St. Louis, Missouri is 630 feet tall. Express this distance in meters and in kilometers.

Q: Match each item with the correct statement below.a. acceleration h. metricb. Aristotle i. milli-c. centripetal acceleration j. periodd. English k. scalare. frequency l. velocityf. Galileo Galilei m. vectorg. kilo n. Constant acceleration1/ the number of cycles of a periodic process that occur per unit time2/ the slope of a distance versus time graph equals this3/ any physical quantity that has a direction associated with it4/ any physical quantity that does not have a direction associated with it5/ the rate of change of velocity6/ time it takes for one complete cycle of a periodic process7/ any object moving in a circle undergoes this8/ metric prefix that means one thousand9/ correctly analyzed the motion of a falling body10/ most widely used system of measure11/ An object undergoing free fall in a vacuum experiences

Q: An aircraft undergoes a constant acceleration of 11 m/s2 for 12 seconds. The distance traveled is __________.

Q: A pilot puches the throttle lever forward, changing his speed from 0 m/s to 40 m/s in 7 seconds. The acceleration of the racecar is _________.

Q: A glider is in a banked curve with a radius of 125 m radius curve at a constant speed of 10 m/s. Its acceleration is __________.

Q: A racecar driver steps on the gas, and his racecar travels 20 meters in 2 seconds starting from rest. The acceleration of the racecar is __________.

Q: A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds. The acceleration of the racecar is _________.

Q: A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is __________.

Q: The velocity acquired after starting from rest is __________.

Q: The acceleration after starting from rest is __________.

Q: The distance from the starting point is __________.

Q: The acceleration is __________.

Q: The velocity is __________.

Q: The distance below the rooftop is __________.

Q: If an object's acceleration is nonzero, its velocity must be __________.

Q: When a body moves in circular motion at constant speed, the velocity and acceleration point __________.

Q: As the ball is going downwards, the velocity points __________ and the acceleration points __________.

Q: At the peak of the motion, the velocity is __________ and the acceleration points __________.

Q: As the ball is going upwards, the velocity points __________ and the acceleration points __________.

Q: An aircraft approaches a runway that runs directly east as a strong wind blows out of the south. The direction that the aircraft should points in order to land on the runway is __________.

Q: The slope of a distance vs. time graph is the __________.

Q: The slope of a velocity vs. time graph is the __________.

Q: A body at the end of a spring oscillates up and down ten times in five seconds. The period of oscillation is __________.

Q: In expressions like Dv and Dt, D stands for _________.

Q: The time for one complete cycle of a periodic process to take place is called the __________.

Q: The number of cycles of a periodic process that occur per unit time is called the __________.

Q: The proper abbreviation for "˜kilohertz" is __________.

Q: The notation s-1 means __________.

Q: The proper abbreviation for "˜seconds' is __________.

Q: A quantity that has both a magnitude and direction associated with it is called a __________.

Q: A quantity that has only a magnitude but no direction associated with it is called a __________.

Q: Which of these objects is moving with constant velocity but changing acceleration?a. a rock dropped from a bridgeb. a car going around a banked curve at 40 m/sc. an aircraft being launched off of an aircrft carrierd. an aircraft in a banked turn at 100 m/s

Q: What is "uniform motion?" a. smooth motion b. motion with zero acceleration c. motion with constant velocity d. motion at a constant speed e. motion along a straight path

Q: Which of these are a part of the scientific method?a. hypothesis b. experiment c. dogmad. observation

Q: The object's acceleration is zero in region(s)a. I b. II c. IIId. no regions

Q: The notation s-1 means the same thing asa. 1/s b. Hz c. per secondd. none of the above

Q: Which of these are English units?a. seconds b. feet c. kilometersd. slugs

Q: Which of these are units of measure? a. time b. energy c. seconds d. kilometers e. volume

Q: Which of these are metric units? a. grams b. pounds c. seconds d. kilometers e. square miles

Q: Which of these are physical quantities? a. time b. energy c. seconds d. kilometers e. volume

Q: Freely falling bodies experiencea. motion with constant velocityb. motion with zero accelerationc. motion with constant accelerationd. motion at a constant speede. none of the above

Q: The maximum possible speed in nature isa. warp 10 b. the speed of light c. infinited. unknown

Q: A racecar driver steps on the gas, and his racecar travels 20 meters in 2 seconds starting from rest. The acceleration of the racecar is a. 0 b. 5 m/s2 c. 9.8 m/s2 d. 10 m/s2 e. 20 m/s2

Q: A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds. The acceleration of the racecar is a. 0 b. 2 m/s2 c. 4 m/s2 d. 5 m/s2 e. 7.5 m/s2

Q: A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is a. 0 b. 0.2 m/s2 c. 4 m/s2 d. 8 m/s2 e. 16 m/s2

Q: The acceleration in m/s2 after starting from rest is a. 0 b. 2 c. 4 d. 8 e. 16

Q: The velocity acquired after starting from rest in m/s is a. 0 b. 2 c. 4 d. 8 e. 16

Q: The distance from the starting point in meters is a. 0 b. 2 c. 4 d. 8 e. 16

Q: The acceleration of the ball in m/s2 is a. 0 b. 4.9 c. 9.8 d. 6 e. none of these

Q: The velocity of the ball in m/s is a. 0 b. 4.9 c. 9.8 d. 6 e. none of these

Q: The distance the ball is below the rooftop in meters is a. 0 b. 4.9 c. 9.8 d. 6 e. none of these

Q: When a body moves in circular motion at constant speed a. the velocity and acceleration point in the same direction b. the velocity and acceleration point in opposite directions c. the velocity and acceleration point perpendicular to each other d. the acceleration is zero e. none of the above

Q: As the ball is going downwards a. the velocity and acceleration both point up b. the velocity points up and the acceleration down c. the velocity points down and the acceleration up d. the velocity and acceleration both point down e. the acceleration is zero

Q: At the maximum height a. the velocity and acceleration both point up b. the velocity points up and the acceleration down c. the velocity points down and the acceleration up d. the velocity and acceleration both point down e. the velocity is zero f. the acceleration is zero

Q: As the ball is going upwards a. the velocity and acceleration both point up b. the velocity points up and the acceleration down c. the velocity points down and the acceleration up d. the velocity and acceleration both point down e. the acceleration is zero

Q: The object's speed is greatest in region(s)a. I b. II c. IIId. no regions

Q: The object is at rest in region(s)a. I b. II c. IIId. no regions

Q: The object's acceleration is negative in region(s)a. I b. II c. IIId. no regions

Q: The object's velocity is negative in region(s)a. I b. II c. IIId. no regions

Q: The object's velocity is positive in region(s)a. I b. II c. IIId. no regions

Q: The object's velocity is zero in region(s)a. I b. II c. IIId. no regions

Q: The acceleration of the moving object is a. zero b. constant c. increasing d. decreasing e. not determinable

Q: The velocity of the moving object is a. zero b. constant c. increasing d. decreasing e. not determinable

Q: The acceleration of the moving object is a. zero b. constant c. increasing d. decreasing e. not determinable

Q: The velocity of the moving object is a. zero b. constant c. increasing d. decreasing e. not determinable

Q: The sum of vectors A and B isa. b. c. d.