Force, work, and motion

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

• True
• False

Tags

NGSS.MS-PS2-2

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.

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

• true
• false

Tags

NGSS.MS-PS2-2

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.

Tags

NGSS.MS-PS2-2

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

Tags

NGSS.MS-PS2-1

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

Tags

NGSS.MS-PS2-2

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

Tags

NGSS.MS-PS2-2

What is the unit used to measure force? 

• Pounds 
• Grams 
• Newtons 
• kg/ m²

What type of energy is caused by an object’s vibration?

• Electrical
• Sound 
• Thermal
• Light

Tags

NGSS.MS-PS4-2

How much work is done by a motor that lifts a train car on El Toro to the top of a 70-meter hill using a force of 15,000 N?

• 1,000,000 J
• 214.29 J
• 1,050,000 J
• 105,000 J

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4