Chapter 5 Test Physics

When a 100 N force acts horizontally on an 8.0 kg chair, the chair moves at a constant velocity. Which statement must be true?

• The chair accelerates at 12.5 m/s².

• The applied force is greater than the friction force.

• The friction force is -100 N.

• There is no friction between the floor and the chair.

Tags

NGSS.HS-PS2-1

Consider a puck that slides without friction across the ice during a hockey game. Which statement is correct?

• The puck moves at constant acceleration.

• The puck moves at constant speed.

• The puck will come to a stop.

• A constant horizontal force acts on the puck.

Tags

NGSS.HS-PS2-1

A book rests on a desktop. Which force is equal and opposite the normal force?

• Force of weight of the book

• Force of static friction

• Force of kinetic friction

• The gravitational force exerted by the desktop on the book.

A 1.6 kg block is pulled across a level surface by a horizontal force of 12 N. Determine the coefficient of friction between the block and the surface if the block moves at constant velocity.

• 0.25

• 0.50

• 0.76

• 1.30

Tags

NGSS.HS-PS2-1

If an object is at rest, what can you say about the forces acting on the object?

• They are balanced

• They are unbalanced

Tags

NGSS.HS-PS2-1

If an object is falling at terminal velocity, what can you say about the forces acting on the object?

• They are balanced

• They are unbalanced

Tags

NGSS.HS-PS2-1

If an object is accelerating, what can you say about the forces acting on the object?

• They are balanced

• They are unbalanced

Tags

NGSS.HS-PS2-1

A spring has a spring constant of 330 N/m.  How far is the spring compressed if 150 N of force are used?

• 2.2 m
• 0.0014 m
• 5.0 m
• 0.45 m

A force of 470 N is applied to stretch a spring which has a spring constant, k=1100 N/m.  How much does the spring stretch past its free length?

• 0.214 m
• 2.34 m
• 0.427 m
• 5.17 X 10^5 m

What force should be applied to compress a spring by 0.013 m if its spring constant is k = 1900 N/m?

• 1880 N
• 24.7 N
• 1900 N
• 0.127 N

Tags

CCSS.8.EE.C.7B