Chapter 3 Linear Motion Questions (Hand out) Name: ______
1) The two measurements necessary for calculating average speed are
2) A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is
3) A car maintains a constant velocity of 100 km/hr for 10 seconds. During this interval its acceleration is
4) While an object near the Earth's surface is in free fall, its
5) A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is
6) An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be
7) If an object falling freely were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be
8) If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by about
9) If a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s/s, then its speed reading would increase each second by
10) Twelve seconds after starting from rest, an object falling freely will have a speed of
11) If an object moves with constant acceleration, its velocity must
12) If a car increases its velocity from zero to 60 km/h in 10 seconds, its acceleration is
13) If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will be
14) An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about
15) It takes 6 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?
16) In each second of fall, the distance a freely falling object will fall is
17) A car accelerates at 2 meters/s/s. Assuming the car starts from rest, how far will it travel in 10 s?
18) Drop a rock from a 5-m height and it accelerates at 10 m/s2 and strikes the ground 1 s later. Drop the same rock from a height of 2.5 m and its acceleration of fall is about
19) A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always
20) While a car travels around a circular track at a constant speed, its
21) If a car accelerates from rest at 2 meters per second per second, its speed 3 seconds later will be about
22) A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about
23) An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration in meters per second per second is approximately
24) At one instant an object in free fall is moving downward at 50 meters per second. One second later its speed should be about
25) At one instant a heavy object in air is moving upward at 50 meters per second. One second later its speed is approximately
26) Disregarding air resistance, objects fall with constant
27) A ball is thrown upwards and caught when it comes back down. In the presence of air resistance, the speed with which it is caught is always
28) Starting from rest, the distance a freely falling object will fall in 0.5 second is about
29) One half second after starting from rest, a freely falling object will have a speed of about
30) An object falls freely from rest on a planet where the acceleration due to gravity is 20 meters per second squared. After 5 seconds, the object will have a speed of
31) An object falls freely from rest on a planet where the acceleration due to gravity is twice as much as it is on Earth. In the first 5 seconds it falls a distance of
32) An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about
33) It takes 6 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?
34) If you drop an object, it will accelerate downward at a rate of 9.8 meters per second per second. If you instead throw it downwards, its acceleration (in the absence of air resistance) will be
35) In each second of fall, the distance a freely falling object will fall is
36) If a projectile is fired straight up at a speed of 10 m/s, the time it takes to reach the top of its path is about
37) If a projectile is fired straight up at a speed of 10 m/s, the total time to return to its starting position is about
38) Consider drops of water that leak at a steady rate from a dripping faucet. As the drops fall they
39) Disregarding air drag, how fast must you toss a ball straight up in order for it to take 2 seconds to return to the level from which you tossed it?
40) A car accelerates at 2 meters per second per second. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 30 m/s?
41) A car accelerates from rest for 5 seconds until it reaches a speed of 20 m/s. What is the car's acceleration in meters per second per second?
42) Ten seconds after starting from rest, a car is moving at 40 m/s. What is the car's acceleration in meters per second per second?
43) When a rock thrown straight upwards gets to the exact top of its path, its
44) A bullet is dropped from the top of the Empire State Building while another bullet is fired downward from the same location. Neglecting air resistance, the acceleration of
45) The muzzle velocity of a bullet fired from a new rifle is 100 m/s. Neglecting air resistance, at the end of one second a bullet fired straight up into the air will have traveled a distance of
46) A bullet is fired straight down from the top of a high cliff. Neglecting air resistance, the acceleration of the bullet in meters per second per second
47) A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a gun, straight down towards the water. Neglecting air resistance, the acceleration just before striking the water
48) Someone standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, the ball to hit the ground below the cliff with the greater speed will be
49) A ball is thrown upwards. Neglecting air resistance, what initial upward speed does the ball need to
50) A ball is thrown 125 meters upward and then falls the same distance back to Earth. Neglecting air resistance, its total time in the air is
51) A pot falls from a ledge and hits the ground 45 m below. The speed with which it hits the ground is
52) The vertical height attained by a basketball player who achieves a hang time of a full 1 s is
53) A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s. Neglecting air resistance, one second later the rock's speed is
54) A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s. Neglecting air resistance, two seconds later the rock's speed is
55) A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s. How far below the level from which it was thrown is the rock 2 seconds later?
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