Linear Motion Review

An object travels 8 meters in the first second of travel, 8 meters again during the second of travel, and 8 meters again during the third second. Its acceleration is

0

Suppose a jumper claims a hang time of 2 seconds. Then that jumper must be able to jump a vertical distance of

1 meter

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by

10 m/s

A ball is thrown straight up. At the top of its path its acceleration is

10 m/s/s

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

10 m/s/s

Suppose an object is in free fall. Each second the object falls

10 m/s/s

When a basketball player jumps to make a shot, once the feet are off the floor, the jumper's acceleration

10 m/s/s

When something falls to the ground, it accelerates. This acceleration is called the acceleration due to gravity and is symbolized by the letter g. What is the value of g on the earth's surface?

10/s/s

Ten seconds after starting from rest, a freely falling object will have a speed of about

100 m/s

If an object were equipped with a speedometer and allowed to fall freely on a planet where the acceleration due to gravity is 20m/s^2, the reading on the speedometer increases each second by

20 m/s

If a projectile is fired straight up at a speed of 10 m/s, the total time to return to its starting point is about

2s

Ten seconds after starting from rest, a car is moving at 40 m/s. What is the car's average acceleration?

4 m/s/s

Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35km/h to 40 km/h to 45km/h the next second. what is the cars acceleration?

40-35/1=5m/s/s

One-half second after starting from rest, a freely falling object will have a speed of about

5 m/s

Suppose you take a trip that covers 240km and takes 4 hours to make. Your average speed is

60km/h

A car accelerates at 2 m/s^2. Assuming the car starts fro rest, how much time does it need to accelerate to a speed of 30 m/s?

A=v/T 2m/s^2=30 15s

In the absence of air resistance, objects fall at constant

Acceleration

As an object falls freely in a vacuum, its

Acceleration is 10 m/s

When you look at the speedometer in a moving car, you can see the car's

Instant velocity

One possible unit of speed is

M/S

Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is NOT true?

Speed=Constant, Velocity=changing, Acceleration=Constant

A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be

The same as it was thrown

A ball is thrown straight up. At the top of its path its instantaneous speed is

0

Speed is

rate of movement

If you drop a feather and a coin at the same time in a tube filled with air, which will reach the bottom of the tube first?

the coin, because of the air resistance