Physics Force and Newton's Laws

Camille launches has a catapult that changes the velocity of a ball (m= 2 kg) from 0 to 10 m/s in one sec. What is the average force that is exerted on the ball during launch?

• 20 N

• 5 N

• 8 N

• 0.2 N

Tags

NGSS.HS-PS2-1

If there is no friction, then the acceleration would be equal to

• mg

• sin(θ)mg

• g

• sin(θ)g

Tags

NGSS.HS-PS2-1

If μ_k = 0.65 and μ_s = 0.7, acceleration would be equal to

• 0 m/s/s

• 9.8 m/s/s

• 3.35 m/s/s

• -2.63 m/s/s

Tags

NGSS.HS-PS2-1

What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 

• 0.78
• 0.51
• 0.78 N
• 0.58 N

Tags

NGSS.HS-PS2-1

A 80 kg skydiver is free falling at a constant velocity of 19 m/s. What is the net (total) force acting on her?

• 1,520 N
• 0 N
• 4.21 N
• Not enough information to answer

Tags

NGSS.HS-PS2-1

A man weighing 800 Newtons is standing in an elevator. If the elevator rises with an acceleration of 0.5 meters per second², the force exerted by the elevator on the man will be

• 400 N

• 800 N

• 1200 N

• 1000 N

Tags

NGSS.HS-PS2-1

A cannonball with a mass of 0.5 kg is flying at an acceleration of 10 m/sec/sec. What is it's force?

• 50 Newtons
• 5 Newtons
• 20 Newtons
• 9.5 Newtons

Tags

NGSS.HS-PS2-1

What will Bronco's (m=100kg) acceleration be as he jumps from an airplane and is falling with air resistance of 400N?

• 10 m/s², Down
• 0 m/s²
• 6 m/s², Down
• 4 m/s², Down

A 2000kg satellite is in space where there is no friction.  What force is required in order for the satellite to maintain a velocity of 300m/s?

• 2000N
• 20000N
• 300N
• 0

Tags

NGSS.HS-PS2-1

Sam is hover boarding down they hall at a constant velocity. Assuming there is friction, which of the following must be true?

• The force applied by the board must be greater than the frictional force

• The frictional force must equal the force applied by the board

• The force applied must equal zero

• There is not enough information

Tags

NGSS.HS-PS2-1