Physics Quiz 07

A fixed pulley is employed to

Change direction of force

Do more work with the same force but without using pulley

Have mechanical advantage greater than one

To do same work

Correct! Wrong!

The weight of a 10 kg block is

9.8 N

980 N

10 N

98 N

Correct! Wrong!

A body at rest may have

Energy

Speed

Momentum

Velocity

Correct! Wrong!

Which of the following is not necessary for work to be done?

A constant speed

Displacement

An applied force

A force component along the displacement

Correct! Wrong!

Forces of 3N, 4N and 12N act at a point in mutually perpendicular direction. The magnitude of the resultant force in newton is

Indeterminate from the information given

13

5

11

Correct! Wrong!

A car is traveling due east at 40 miles /hr turns south and maintains the same speed. What is the change in velocity of car?

40 miles /hr east-south

80 miles /hr east-south

400 miles /hr east-south

None

Correct! Wrong!

A force of6.0 N acts on a body of mass 1 kg. for some time during which the body attains a velocity of 30 m/s/ The time (in second) for which the force acts on the body is

26

5

6

2

Correct! Wrong!

The static friction is

Sometimes greater and sometimes less than the dynamic friction

Always less than the dynamic friction

Always greater than the dynamic friction

Equal to the dynamic fiction

Correct! Wrong!

Which is the suitable method to decrease friction?

Polishing

All of these

Ball and roller bearings

Lubrication

Correct! Wrong!

The minimum number of unequal forces whose vector sum can equal to zero is

1

3

2

4

Correct! Wrong!

A fixed pulley is employed to

The weight of a 10 kg block is

A body at rest may have

Which of the following is not necessary for work to be done?

Forces of 3N, 4N and 12N act at a point in mutually perpendicular direction. The magnitude of the resultant force in newton is

A car is traveling due east at 40 miles /hr turns south and maintains the same speed. What is the change in velocity of car?

A force of6.0 N acts on a body of mass 1 kg. for some time during which the body attains a velocity of 30 m/s/ The time (in second) for which the force acts on the body is

The static friction is

Which is the suitable method to decrease friction?

The minimum number of unequal forces whose vector sum can equal to zero is

About the author

Muhammad Arslan

A fixed pulley is employed to

The weight of a 10 kg block is

A body at rest may have

Which of the following is not necessary for work to be done?

Forces of 3N, 4N and 12N act at a point in mutually perpendicular direction. The magnitude of the resultant force in newton is

A car is traveling due east at 40 miles /hr turns south and maintains the same speed. What is the change in velocity of car?

A force of6.0 N acts on a body of mass 1 kg. for some time during which the body attains a velocity of 30 m/s/ The time (in second) for which the force acts on the body is

The static friction is

Which is the suitable method to decrease friction?

The minimum number of unequal forces whose vector sum can equal to zero is

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About the author

Muhammad Arslan