Physical Science Unit 3 Retake

What is the work done when a 20-N force pushes a cart 3.5 m?

• 70J
• 6.8J
• 23.5J
• 17.5J

Two factors that determine work are...

• Force

• Mass

• Velocity

• Distance

If you push a cart with a force of 60 N for 2 m... how much work have you done?

• 120 J

• 30 J

• 120 N

• 30 N

Tags

NGSS.MS-PS2-2

It is the rate of doing work or is work per unit of time.

• Power

• Energy

• Motion

• Work

What does the 3rd law of motion say?

• F=ma

• Kinetic energy is stored energy.

• Every action has an opposite reaction.

• An object in motion stays in motion until acted upon by an unbalanced force. An object in rest will stay at rest until acted upon by an unbalanced force.

What is potential energy?

• Stored energy

• Energy an object as due to motion.

• electrical energy

• chemical energy

If Bob pushes a stack of papers with a mass of 12 grams, and an acceleration of 8 m/s, then how much force will he need to apply?

• 1.5 Newtons

• 84 Newtons

• 96 Newtons

• 2/3 Newtons

Which of Newton's laws of motion does the image best represent?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Newton's 4th Law

What type of energy transformation occurs, when a hawk eats a mouse and then uses the energy from the mouse to fly?

• mechanical energy to chemical energy

• thermal energy to mechanical energy

• chemical energy to mechanical energy

• mechanical energy to thermal energy

Tags

NGSS.MS-LS1-7

NGSS.MS-PS3-5

Which object shows an energy transformation from electrical to mechanical?

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Tags

NGSS.HS-PS3-3