Force, Motion and Energy

A long, round balloon is fastened to the end of a toy rocket. When the balloon is blown up and released, the rocket launches into the air. Which force causes the rocket to launch?

• The air released from the balloon

• The weight of the rocket

• The pull of gravity on the rocket

• The mass of the balloon

Tags

NGSS.MS-PS2-2

Unless an object at rest is acted upon by a force, it stays at rest due to its

• Matter

• Inertia

• Friction

• Gravity

In order for someone to push a heavy box 20 feet across the floor, which of the following must happen?

• The force of the person pushing must be greater than the force of friction.

• The force of the person pushing must be greater than to force of gravity.

• The box must weigh more than the person pushing it.

• The friction has to be a greater opposing force

Tags

NGSS.MS-PS2-2

Energy that moving matter has, is called?

• Thermal Energy

• Energy of Motion

• Potential Energy

• Kinetic Energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following would increase the motion of a ball after it is kicked?

• A rocky surface

• A high, grassy surface

• A surface slopped uphill

• A surface sloped downhill

Tags

NGSS.MS-PS3-1

Which would be needed to make a ball at the base of a ramp move up the ramp?

• Gravity

• Inertia

• Force

• Friction

Tags

NGSS.MS-PS2-2

Which factor is most helpful in lowering an object with the use of a pulley?

• Friction, because it makes the object move at a constant rate

• Gravity, because it allows the object to resist any change

• Friction, because it helps speed up the object's movement

• Gravity, because it pulls down on the object

Carli is trying to determine if a force can change the direction of an object’s motion. The answer to which question will best help her come to a conclusion?

• What happens when a ball rolls down a hill?

• What happens when a moving wagon comes to a stop?

• What happens when a person pushes on a large brick wall?

• What happens when a bat is used to hit a ball?

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When Anna tells her father that her bicycle is hard to pedal, he oils the chain. How does this make her bike easier to ride?

• Friction on the bike has decreased.

• Friction in the bike has increased.

• Gravity on the bike has decreased,

• Gravity on the bike has increased

Friction acts in a direction __________ to the direction of an object's motion

• Unrelated

• Opposite

• Equal

• Perpendicular