Force and Motion EOG Review BCS

Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion?

• ball with a mass of 5 kg
• ball with a mass of 10 kg
• ball with a mass of 15 kg
• ball with a mass of 20 kg

Which graph represents an object that is decreasing in speed?

• A
• B
• C
• D

A girl walked for 30 minutes. She noticed that she traveled farther in the first 15 minutes of her walk than in the second 15 minutes. What can she conclude about her walk?

• She walked over many hills.
• Her average speed was faster during the first half of her walk.
• She walked in two different directions.
• She was walking at a constant speed.

Which best describes the speed of a ball as it is thrown straight up into the air and comes back down?

• The ball goes up at a constant speed, stops, then comes down at a constant speed.
• The ball goes up at a constant speed, stops, and increases speed as it comes down.
• The ball goes slower and slower as it goes up, stops, and then goes faster and faster as it comes down. 
• The ball goes slower and slower as it goes up, stops, and then comes down at a constant speed.

A student uses a rubber band to launch the four objects shown in the table.
If the student pulls the rubber band back the same amount each time, which object will most likely move the fastest when launched?

• paper clip
• piece of paper
• eraser
• rubber ball

A pencil falls off of a desk. What moves the pencil toward the floor?

• mass
• friction
• gravity
• speed

A child rides a wagon down a hill. Eventually, the wagon comes to a stop. Which is most responsible for causing the wagon to stop?

• gravity acting on the wagon
• friction acting on the wagon
• the mass of the wagon
• the mass of the child

James and Roy compare the motion of two balls by rolling them across the floor and recording the time it takes them to travel the distance. Ball X travels the distance in 15 seconds. Ball Y travels the distance in 11 seconds. Which best compares the motion of the two balls?

• Ball X travels faster than Ball Y
• Ball Y travels faster than Ball X.
• Both balls travel at the same speed.
• Both balls travel at a constant speed.

The graph below shows the motion of two cars.
How does the motion of the two cars compare?

• Car 1 is slowing down, and Car 2 is speeding up. 
• Car 1 is not moving, and Car 2 is maintaining a constant speed.
• Car 1 is maintaining a constant speed, and Car 2 is speeding up.
• Car 1 is speeding up, and Car 2 is maintaining a constant speed.

Which is an example of trying to increase friction?

• spreading sand onto an icy road
• reducing the weight of an object
• pouring oil into the engine of a car
• waxing the underside of a surfboard