Energy, Work, Force & Motion

All forces have______

• joules
• size and direction
• height
• weight

True or false:  At the peak of the lift hill, a rollercoaster car has more potential energy than any other form of energy.

• True
• False

A greater applied force is required to move an object with a greater mass than one with a smaller mass.

• True
• False

Tags

NGSS.HS-PS2-1

According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will

• remain in motion.
• eventually come to a stop.
• change its momentum.
• accelerate.

The gravitational force of any object near Earth's surface is ____.

• unknown
• friction
• Newton's first law
• 9.8 m/s²

Tags

NGSS.HS-PS2-4

When the net force is zero, the forces on an object are balanced. True or false.

• true
• false

Tags

NGSS.HS-PS2-1

What must occur to a shopping cart at rest in order to make it roll forward?

• A force must be provided to overcome gravity.
• Balanced forces must be acting on the cart.
• An unbalanced force applied to the cart pushing or pulling it forward.
• The unbalanced force acting upon it must be smaller than that of friction.

For every action there is an equal and opposite reaction.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

Two students are in a baseball game. The first student hits a ball very hard and it has a greater acceleration than the second student who bunts the ball lightly.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

A rocket is sent into space.  When the power dies out, the rocket will just keep floating and moving in space forever (unless an unbalanced force, such as a meteor, runs into it).

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them