Question 1

A resultant force of 2N acts n a body whose mass is 1 kg .what is the acceleration of the body ?

Accepted Answer

2.0m/s

Answer

4.00m/s

Answer

3.00m/s

Answer

1.00m/s

Question 2

which of the followig is a characteristics of mass?

Accepted Answer

it is a measure of inertia exhibited by an object.

Answer

it is a vector quantity

Answer

it varies from place to place

Answer

it is measured in newton(N)

Question 3

to what type(in class) of lever does a pair of scissors belong ?

Accepted Answer

first class

Answer

second class

Answer

fourth class

Answer

third class

Question 4

a machine whose M.A. is 5 raised a load through 2 m by applying a force which moves through 15m .what is the efficiency of the machine?

Accepted Answer

66.7%

Answer

13.3%

Answer

40.0%

Answer

33.3%

Question 5

which of the following machines is associated with inclined plane

Accepted Answer

screw

Answer

screw driver

Answer

lever

Answer

pulley

Question 6

which of these machines is used for hoisting flags?

Accepted Answer

pulley

Answer

inclined plane

Answer

lever

Answer

wedge

Question 7

A pendulum bob undergoing simple harmonic motion has 2.0 cm and 12 hz as amplitude and frequency respectively.calculate its period

Accepted Answer

0.083 seconds

Answer

0.83 seconds

Answer

0.073 seconds

Answer

0.075 seconds

Question 8

A simple pendulum makes 40 oscillations in two minutes .what is its frequency?

Accepted Answer

0.33

Answer

40.00

Answer

120.00

Answer

0.66

Question 9

An object undergoing simple harmonic motion has its energy continuously changing from

Accepted Answer

kinetic to potential energy

Answer

chemical energy to sound

Answer

heat to potential energy

Answer

Heat to kinetic energy

Question 10

A worker lifts a 10 kilogram block a vertical height of 2 meters. Thework he does on the block is:

Accepted Answer

200 Joules

Answer

49 joules

Answer

20 joules

Answer

5 joules

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