Force and Motion Review

What happens to the speed of an object when the position does not change over a period of time?

• speed increases

• speed decreases

• speed remains zero

• speed changes uniformly

An object is moving with a speed of 12 meters/second in a straight line. What will be the distance traveled by the object in 5 seconds? (distance = speed × time)

• 2.4 meters

• 7 meters

• 17 meters

• 60 meters

Four position-versus-time graphs are shown. Click on the graph representing an object moving at a constant speed in a positive direction.

• 
• 
• 
• 

Tags

NGSS.MS-PS3-1

The table shows position and time of a moving object in a straight line. Which THREE statements are correct about the object's motion? Pick up to 5 answers.

• The object comes back to its original position after 7 seconds.

• The object moves only in the forward direction from 0 to 7 seconds.

• The object stays in the same position from 3 seconds to 4 seconds.

• The object starts moving in a backward direction after 5 seconds time.

• The object is moving in the forward direction between 1 second and 3 second.

A student performs an investigation of gravitational force. The student drops a red ball straight down and throws a blue ball in front of him. The student claims that the thrown ball was the only ball that experienced gravitational force. Which statement BEST evaluates the claim?

• The claim is incorrect because only the dropped ball experienced gravitational force.

• The claim is correct because gravitational force is only experienced by objects that are moving.

• The claim is incorrect because both balls experienced gravitational force and fell to the ground.

• The claim is correct because gravitational force prevents objects from falling straight down.

Tags

NGSS.MS-PS2-4

A baseball player hits a baseball with a bat. The ball travels very high and over the fence before falling to the ground. Which BEST explains what happens to the ball?

• Magnetic force pushes the ball up in the air.

• Gravitational force pushes the ball up in the air.

• Magnetic force pulls the ball back to the ground.

• Gravitational force pulls the ball back to the ground.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The diagram shows an experiment Asha designs to investigate the force of gravity. Asha attaches lead weights on strings to the fronts of two identical toy cars. Car 1 is attached to a 5-gram weight, and Car 2 is attached to a 10-gram weight. She hangs the strings off a table, holding the cars 60 centimeters away from the edge. Asha lets go of the cars and measures how long it takes each car to roll to the edge of the table. Which car will get to the edge first? Why?

• Car 1 will finish first because the mass of the lead weight is lower, so there is less gravitational force acting on it.

• Car 2 will finish first because the mass of the lead weight is higher, so there is less gravitational force acting on it.

• Car 2 will finish first because the mass of the lead weight is higher, so there is more gravitational force acting on it.

• Car 1 will finish first because the mass of the lead weight is lower, so there is more gravitational force acting on it.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The diagram shows four objects that are falling from different heights. Which object experiences the highest gravitational force?

• object W because it has the largest size

• object X because it has the largest mass

• object Y because it has the smallest mass

• object Z because it has the smallest size

Tags

NGSS.MS-PS2-4

Andrew glues a 5 kg weight to the top of one car. Which statement describes the most likely effect it will have on the car?

• The car has more mass and more force pulling on it, so it will take less time to reach the edge of the table.

• The car has less mass and more force pulling on it, so it will take more time to reach the edge of the table.

• The car has less mass but the same amount of force pulling on it, so it will take less time to reach the edge of the table.

• The car has more mass but the same amount of force pulling on it, so it will take more time to reach the edge of the table.

Tags

NGSS.MS-PS2-2

Andrew adds another weight to car X, and now the weight pulling on the car is 10 grams. Which is the most likely result of Andrew adding the extra weight?

• Car X has more force pulling on it and will travel slower than car Y.

• Car X has more force pulling on it and will travel faster than car Y.

• Car X has more gravity pulling on it and will travel faster than car Y.

• Car X has less gravity pulling on it and will travel slower than car Y.

Tags

NGSS.MS-PS2-2