Forces and Motion Review

If a car travels 150 kilometers in 3 hours, what is its speed?

• 50 km/h

• 100 km/h

• 45 km/h

• 30 km/h

What happens when two forces acting in opposite directions on an object are equal in size?

• The object moves in the direction of the larger force.

• The object moves in the direction of the smaller force.

• The object does not move.

• The object spins.

Which would experience the greatest amount of gravitational force?

• A car

• A chair

• A soccer ball

• A bowling ball

What is an example of unbalanced forces acting on an object?

• A book resting on a table.

• A car parked on a hill that starts to roll down.

• A vase sitting still on a shelf.

• A picture hanging motionless on a wall.

Tags

NGSS.MS-PS2-2

If you run 100 meters in 25 seconds, what is your speed?

• 2.5 m/s

• 4 m/s

• 5 m/s

• 3 m/s

Which of the following is a true statement about balanced forces?

• They cause an object to start moving.

• They cause an object to stop moving.

• They cause a change in the direction of an object's motion.

• They do not change the motion of an object.

Which would experience the least amount of gravitational force?

• A ping pong ball

• A car

• A soccer ball

• A bowling ball

What does it mean when forces on an object are unbalanced?

• The object will move at a constant speed.

• The object will change its motion.

• The object will not move.

• The object will rotate.

A car is driving down the road. Its positions and times are listed below.

What is true about the motion of the car?

1 hour - 60 miles

2 hours - 120 miles

3 hours - 180 miles

4 hours - 240 miles

• the motion is constant; forces are unbalanced

• the motion is constant; forces are balanced

• the car is accelerating; forces are balanced

• the car is accelerating; forces are unbalanced

Which scenario illustrates balanced forces?

• A leaf falling from a tree.

• A tug of war where both teams are equally matched and the rope does not move.

• A rocket launching off into space.

• A ball rolling down a hill.