Force and Motion Part 3

Greg placed two identical toys cars on the plastic ramps shown above. He let the cars roll down the ramps.

Greg’s hypothesis could be –

• ramps made of plastic create more friction

• the size of the car affects its speed

• the height of the ramp affects speed

• cars made of plastic travel faster than cars made of metal

What causes the car to roll down the ramps?

• Magnetic force

• Solar energy

• The force of gravity

• Electricity

Tomas launched a model rocket into the sky. Eventually, the rocket will fall to Earth. What force will cause the rocket to fall?

• Solar energy

• Magnetic force

• Gravity

• Initial thrust

Helen rolled a car across the floor. She then applied a force to the car. The force was one of the four forces shown by the arrows.

Which force will MOST likely increase the car’s speed?

• Force A

• Force B

• Force C

• Force D

A model rocket was launched at a park. Larry watched the rocked rise and fall as shown.

Letter S represents the –

• magnet force of the rocket

• initial force of the rocket

• force of gravity

• effect of electrical current

Mr. James, the science teacher, placed two identical cars on two identical wooden ramps as shown below.

Mr. James let the car on Ramp F roll down the ramp. At the same time, he pushed the car down Ramp G. Which of the following will MOST likely happen?

• The car on Ramp F will reach the bottom faster

• The car on Ramp G will reach the bottom faster

• The cars will reach the bottom at the same time.

• Neither car will make it to the bottom.

Mike hit a ball that was on a table with the force of his hand. Which of the following will LEAST likely happen?

• It will increase in speed.

• It will move in a certain direction.

• It will not move at all.

• It will fall off the table.

A model rocket was launched into the sky.

If Force B affects the rocket as shown, which of the graphs below BEST represents the path of the rocket?

• 
• 
• 
• 

A ball fell off a table as shown.

What force pulls the ball to the ground?

• Electricity

• Magnetic energy

• Sound vibrations

• Gravity

What force makes a bicycle harder to ride on grass than on cement?

• inertia

• gravity

• friction

• magnetism