Investigating Force

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Why is person B having a hard time moving down the hill?

• Person B has more friction than person A.
• Person B has the same friction as person A.
• Person B is out of shape.
• Person B has less friction has person A.

What pulls a ball back to earth?

• Gas
• Gravity
• Friction
• Molecules

1.  It is easier to ride a bicycle down a hill than to ride up a hill because _______ helps the bicycle move down the hill. 

• gravity
• friction
• rotation

What is a force that works AGAINST MOTION?

• Force
• Motion
• Gravity
• Friction

What is a force that works AGAINST MOTION?

• Force
• Motion
• Gravity
• Friction

Should experiments be repeated over and over to see if the results are the same each time?

• yes
• no

Mrs. Gibson creates an experiment with different heights of ramps to see which height makes a toy car travel farther. What is the variable?

• Size of the car

• Height of the ramp

• Distance the car travels

• Surface of the ramp

Students roll toy cars down the same ramp with different coverings like carpet, foil, and sandpaper. What are they trying to test?

• How does the height of a ramp affect the distance a car will roll?

• How does the mass of the car affect the distance a car will roll?

• How does the surface of a ramp affect how fast a car will travel?

• How does the surface of a ramp affect the distance a car will roll?

Mrs. Gibson creates an experiment with different heights of ramps to see which height makes a toy car travel farther. What is the variable?

• Size of the car

• Height of the ramp

• Distance the car travels

• Surface of the ramp