Work, Force, Energy & Simple Machines Test 3

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Work, Force, Energy & Simple Machines Test 3

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Question 1
1 / -0

While loading of boxes on trucks ramp is used. The surface of the ramp is made smoother because, there would be less

A
Mass in box

B
Gravity pulling on the box

C
Friction opposing the box

D
Distance to push the box
Question 2
1 / -0

In removing a nail from a wooden block using a hammer with nail remover, the effort, load and fulcrum positions can be shown as

A

B

C

D
Question 3
1 / -0

Fulcrum is a

A
Pushing force

B
Pulling force

C
The fixed point of a lever

D
An object
Question 4
1 / -0

A ship is heavier than an iron nail, but floats on the water surface, while nail sinks, because

A
Iron nail is thin and ship has large surface area

B
Iron nail is small and ship is big

C
The ship has to save the life of many people

D
The weight of ship becomes equal to the weight of water it displaces
Question 5
1 / -0

What is an effort in lever action?

A
The fixed point of the bar

B
The object that is removed

C
The force applied to move the load

D
None of these
Question 6
1 / -0

The head of an axe is wide at one end and pointed at the other end to help in cutting of wood. Here the head of the axe is an example of

A
an inclined plane

B
a pulley

C
a wheel and axle

D
a wedge

Solution

A wedge is simply a triangular tool, often made of metal, wood, stone or plastic. It is thick on one end and tapers to a thin or sharp edge on the other end. Technically it is an inclined plane (or two inclined planes put together to form a triangle) that moves. A wedge may be attached to a handle to make it easier to use. It is used in cutting wood.
Question 7
1 / -0

What are the different simple machines used in the fishing rod?

A
Pulley and inclined plane

B
Pulley and wheel and axle

C
Wheel and axle and lever

D
Lever and inclined plane
Question 8
1 / -0

A hammer is being used as a lever to pull a nail out of piece of wood which of the following statement is false?

A
Lever can change the direction of force

B
Load is nearer to the fulcrum than the effort

C
Pulling action is change to the vertical lifting action on nail

D
Larger force is used using hammer than simple removal directly
Question 9
1 / -0

In a pair of scissors, identify the fulcrum, effort and load

A
K - Effort, L - Load, M - Fulcrum

B
K - Load, L - Effort, M - Fulcrum

C
K - Effort - L - Fulcrum, M - Load

D
K - Fulcrum - L - Load - M -Effort
Question 10
1 / -0

A ball is rolled on from the hill top with four labeled portion as P, Q, R, and S, which portion it will have its maximum kinetic energy.

A
P

B
Q

C
R

D
S

Solution

At position P the ball has potential energy (energy that an object has due to its position). When it starts rolling down, the potential energy changes into kinetic energy (energy that an object has due to its movement) and at point S, it will have maximum kinetic energy as compared to points R and Q.