Force and Motion

What causes an object to fall to the ground?

• air resistance

• time

• gravity

• friction

What information do you need in order to find the speed of an object?

• th mass of the object and the distance

• the distance the object moved and the time it took to move that distance

• the position of the object and the force used to move it to that postion

• the length of the object and the direction in which it moved

What effect does friction have on an object's motion?

• it slows an objects motion

• it has no effect on an objects motion

• it makes an object start moving

• it makes an object move faster

If a car travels 140 kilometers in 2 hours, what is the speed of the car?

• 70 kilometers

• 280 kilometers per hour

• 70 kilometers per hour

• 140 kilometers per hour

Chris climbs onto a skateboard ramp halfway between the top and the bottom of the ramp. Because gravity acts on Chris, which is most likely to happen?

• He will float above the ramp

• He will roll down the ramp

• He won't move

Ana is pushing a wheelbarrow of rocks. She stops and unloads half of the rocks. How will this effect the force needed to move the wheelbarrow?

• Gravity is increased, making the wheelbarrow easier to move.C

• Gravity is decreased, making the wheelbarrow harder to move

• Friction is increased, making the wheelbarrow harder to move.

• Mass is decreased, making the wheelbarrow easier to move.

How fast was a train moving if it traveled 100 meters in 10 seconds? (speed = distance ÷ time)

• 1 meter per second

• 10 meters per second

• 90 meters per second

• 100 meters per second

Macie’s job at the bookstore requires her to move several heavy boxes of books. How can Macie use the least amount of force to move the boxes?

• by packing the books in larger boxes

• by packing the books in smaller boxes

• stacking the boxes and pulling them out of the storage room

• by stacking the boxes and pushing them out of the storage room

Two students are pushing on opposite sides of a box with equal force.

Which statement BEST describes what will happen?

• The box will not move

• The box will move toward student 1

• The box will move toward student 2

• The box will slowly turn in place

A student went on a walk, and kept track of their time and distance. The data is displayed in the graph. Which best describes the student’s walk?

• The student went up a hill, and then down a hill.

• The student walked very quickly at the beginning of the walk, but then slowed down at the end.

• The student walked slowly at the beginning of the walk, and faster at the end.

• The student walked at a steady pace, and then returned to the starting point.