Question

A wooden block rests on an inclined wooden plane. The
significant forces acting on the block are (**select all that
apply**)

**A.** the block's acceleration.

**B.** the normal force that the inclined plane exerts
on the block.

**C.** friction.

**D.** air resistance.

**E.** the gravitational force that the inclined plane
exerts on the block.

**F.** the gravitational force that the Earth exerts
on the block.

**G.** the tension force that the inclined plane
exerts on the block.

**H.** another force that is not listed here.

Answer #1

**A.** the block's acceleration.

There is no acceleration since block is at rest and hence all forces are in balance

**B.** the normal force that the inclined plane
exerts on the block.

This is significant

**C.** friction.

This is significant

**D.** air resistance.

This is very small in amount and hence non significant

**E.** the gravitational force that the inclined
plane exerts on the block.

This is very small in amount and hence non significant

**F.** the gravitational force that the Earth
exerts on the block.

This is significant given by

F= m*g

**G.** the tension force that the inclined plane
exerts on the block.

This is very small in amount and hence non significant

**H.** another force that is not listed here.

Answer: B,C,F

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