Motion and Stability

Front

A ball is rolling down a hill, and you notice that it rolls the same distance every 2 seconds. If the ball continues moving at the same speed, how far will it have rolled after 6 seconds?

Back

The ball will roll two times the distance it rolled in the first 2 seconds.

Front

Why do all the objects fall toward the ground?

Back

The objects are being pulled toward the Earth's center by a force called gravity.

Front

Based on this data, which of the following best explains the relationship between the mass of the ball, the distance from the ground, and the gravitational pull?

Back

Gravitational pull increases as the mass of the ball increases, but the distance from the ground does not change the gravitational pull.

Front

A student kicks a soccer ball across a grassy field. The ball slows down and eventually stops. Why does the ball stop?

Back

There is a force called friction between the grass and the ball that slows it down.

Front

A student rolls a ball down a smooth hill and then tries rolling the same ball down a grassy hill. On which hill will the ball move faster, and why?

Back

The ball will move faster on the smooth hill because there is less friction.

Front

Back

A second mover helps push with 250 Newtons of force in the same direction as the first mover.

Front

Back

The player’s foot applies an unbalanced force to the ball, causing the change in motion.

Front

Back

B, A, B, C

Front

Back

0.6 meters

Front

A bus is driving on the road. Which best explains why the bus stays on the ground?

Back

Gravitational force from Earth pulls on the car.