Physics Basic Unit#2 Test

A person of mass 60kg carries a 15kg body on the top of building 10m high in 5 minutes. He puts a power in carrying the body.

• 10W

• 5W

• 30W

• 15W

Two masses of 4 gm and 16 gm are moving with the same kinetic energy. The ratio of their linear momentum will be

• 1:2

• 2 :1

• 1: √2

• 4:1

A 2 kg mass lying on a table is displaced in the horizontal direction through 50cm. The work done by the normal reaction will be.

• 0

• 10 Joule

• 100 erg

• 100 Joule

In the presence of air friction the relation for free falling body is

What will be the work done when a 50 kg crate is pushed through 2m across the floor with a force of 50 N?

• 100 J

• 0 J

• 200 J

• 245 J

When a 300 N force is applied to a box weighing 600 N, the box moves 3.0 m horizontally in 20 s. What is the average power?

• 45 W

• 90 W

• 900 W

• 1800 W

A brick of mass 20 kg is dropped from a rest position 25 m above the ground. What is its velocity at a height of 20 m above the ground?

• 5 ms^-1

• 14.14ms^-1

• 2.5 ms^-1

• 10ms^-1

A 4 kg body is thrown vertically upward from the ground with a velocity of 5 ms^–1. Its kinetic energy just before hitting the ground is

• 25 J

• 50 J

• 75 J

• 100 J

Which one is the bigger unit of work

• 10 Watt h

• Calorie

• Electron volt

• Kilo watt hour

A 70 kg man runs up a long flight of stairs in 5.0s. The vertical height of the stairs is 5 m. Calculate his power output in watts.

• 800 Watt

• 700 Watt

• 400 Watt

• 250 Watt