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Question 1

What is the dimension for velocity?

Options

A) ML

B) LT-1

C) MT

D) L-2

E) M3L-1

Comments (3)

Question 2

A car moving with a velocity of 20m/s at 30° to the horizontal, what is the component of the velocity along the horizontal?

Options

A) 17.3m/s

B) 10m/s

C) 20m/s

D) 21m/s

E) 34m/s

Comments (2)

Question 3

If a moving car X collides head-on with a moving car Y in the opposite direction, the conservation of momentum states that:

Options

A) the final momentum of X = final of Y

B) total momentum of X and Y is reversed

C) total momentum of X and Y stays constant

D) initial and final momentum of X is the same

E) initial and final momentum of Y is the same

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Question 4

A bullet of mass 20g travelling horizontally at 100m/s, embeds itself in the centre of a block of wood 1kg which is suspended by light vertical string 1m, calculate the velocity.

Options

A) \(\frac{51}{100}\) m/s

B) \(\frac{100}{51}\) m/s

C) \(\frac{101}{50}\) m/s

D) \(\frac{21}{50}\) m/s

E) \(\frac{23}{51}\) m/s

Comments (1)

Question 5

A car X moving of mass 500kg accelerates at 1ms-2 when the force due to engine is 600N.

Options

A) 200N

B) 300N

C) 234N

D) 100N

E) 600N

Comments (1)

Question 6

Starting from rest a car of mass 1000kg accelerate steadily to 20m/s in 10 sec, what is the average power developed?

Options

A) 0.2kw

B) 4.0kw

C) 10kw

D) 15kw

E) 20kw

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Question 7

A gun of mass 0.1kg has a bullet of mass 0.lkg the bullet laves the piston when fired at a velocity of 200m/s, find the final velocity.

Options

A) 20m/s

B) 23m/s

C) 30m/s

D) 45m/s

E) 15m/s

Comments (1)

Question 8

Which of the following pairs has one vector and one scalar quantity?

Options

A) displacement, acceleration

B) potential energy, work

C) speed, power

D) kinetic energy, force

E) velocity, momentum

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Question 9

If p is the momentum of an object, then the expression P2/m has the same units as

Options

A) acceleration

B) energy

C) force

D) impulse

E) power

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Question 10

A ship floating in clear water of density 1000kg moves to sea-water of density 1050kg where it floats the upthrust on the ship then

Options

A) stays constant

B) decreases

C) increases

D) increases by 0.05 times

E) decreases by 0.05 times

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