Forces and Newton's Laws Reinforcement

How much force is needed to accelerate a 1000-kg car at a rate of 3 m/s²? (F=ma)

• 1000 N

• 2000 N

• 3000 N

• 4000 N

Tags

NGSS.MS-PS2-2

If a 70-kg swimmer pushed off a pool wall with a force of 250 N, at what rate will the swimmer accelerate from the wall? (F=ma)

• 3.57 m/s²

• 2.86 m/s²

• 4.29 m/s²

• 5.00 m/s²

Tags

NGSS.MS-PS2-2

A weightlifter raises a 200-kg barbell with an acceleration of 3 m/s². How much force does the weightlifter use to raise the barbell? (F=ma)

• 600 N

• 200 N

• 2600 N

• 2000 N

Tags

NGSS.MS-PS2-2

A dancer lifts his partner above his head with an acceleration of 2.5 m/s². The dancer exerts a force of 200 N. What is the mass of the partner? (F=ma)

• 8 kg

• 16 kg

• 32 kg

• 40 kg

Tags

NGSS.MS-PS2-2

Newton’s second law of motion states that

• an object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force.

• the force acting on an object is equal to the mass of that object times its acceleration.

• for every action, there is an equal and opposite reaction.

• energy cannot be created or destroyed, only transformed from one form to another.

Tags

NGSS.HS-PS2-1

The rate of acceleration of an object is affected by which two factors?

• Mass and force

• Velocity and time

• Distance and speed

• Energy and power

Tags

NGSS.MS-PS2-2

If you push on a wall with a force of 200 N, with what force does the wall push back?

• 100 N

• 200 N

• 400 N

• 0 N

Tags

NGSS.MS-PS2-1

force of attraction between two objects with mass

• gravitational

• magnetic

• applied

• normal

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which law states that for every action there is an equal and opposite reaction?

• 1st Law

• 2nd Law

• 3rd Law

Tags

NGSS.MS-PS2-1

Which law states that for every action there is an equal and opposite reaction?

• 1st Law

• 2nd Law

• 3rd Law

Tags

NGSS.MS-PS2-1