Force & Motion

A _____________________ must be exerted on an object at rest to cause it to move.

• weight
• inertia
• force
• gravity

Tags

NGSS.MS-PS2-2

Teacher Will is jumping up in the air.  What happens at the highest point of his jump?

• Gravity becomes weaker.
• The force of his jump pulls him back down.
• Gravity starts to pull him back down.
• The force of his jump becomes greater than gravity.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Why does a rolling ball stop?

• Gravity
• Friction
• Waterfalls
• Sand

Tags

NGSS.MS-PS3-5

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 than person A.

Tags

NGSS.MS-PS3-5

The two boys are not moving - are the forces balanced or unbalanced?

• balanced

• unbalanced

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which speed is the fastest?

• 25 km/hr
• 38 km/hr
• 72 km/hr
• 95 km/hr

Tags

NGSS.MS-PS3-1

What is a PUSH or PULL of an object?

• Motion
• Force
• Friction
• Gravity

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is one way to reduce friction?

• Put sandpaper between the surfaces that touch.
• Push the surfaces closer together.
• Shine a light on the surfaces.
• Put a slippery substance between the surfaces.

Which of these would increase the speed of a skateboard on a half pipe?

• Make it less steep.
• Put a back pack on the rider. 
• Make the ramp as slick as possible. 
• Begin skateboarding from the middle of the ramp. 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5