EOT Revision

If a block is in equilibrium, the magnitude of the

block’s acceleration is ______.

• zero

• decreasing

• increasing

• constant, but not zero

Two forces act concurrently on an object on a

horizontal, frictionless surface, as shown in the

diagram.What is the forces needed to make it in equilibrium?

• 4 N to the left

• 4 N to the right

• 16 N to the left

• 16 N to the right

Which of the diagrams represents a box in

equilibrium?

• A

• B

• C

• D

The figure below shows an Atwood’s machine. What is the net force on the mass 𝑚₂?

• 2.0 N

• 6.0 N

• 8.0 N

• 12.0 N

The figure below shows an Atwood’s machine. What is the tension in the string?

• 20 N

• 32 N

• 48 N

• 72 N

What is the net force acting on the mass 𝑚₁?

• 2 N

• 10 N

• 12 N

• 42 N

The tension 𝑇 in the string is _____.

• 18 N

• 42 N

• 60 N

• 78 N

Two masses 𝑚₁= 4𝑘𝑔 and 𝑚₂=2𝑘𝑔 are connected by a light string. Mass 𝑚₁ is placed on the table and 𝑚₂ is suspended by the string. The frictional force between 𝑚1 and the table is 2N. What is the net force on 𝑚₁?

• 2 𝑁

• 3 N

• 6 N

• 12 N

Two masses 𝑚₁= 4𝑘𝑔 and 𝑚₂=2𝑘𝑔 are connected by a light string. Mass 𝑚₁ is placed on the table and 𝑚₂ is suspended by the string. The frictional force between 𝑚1 and the table is 2N. What is the tension in the string?

• 3 N

• 12 N

• 14 N

• 28 N

A boy stands on a bathroom scale in an elevator. His normal weight is 600 N and the scale reads 720 N.Is the acceleration at this moment upward, downward or zero?

• The direction of acceleration is upward.

• The direction of acceleration is downward.