Fundamental and Derived Quantity

Q. What is the SI unit of momentum?

1. $N$
2. $Ns$
3. $kg$
4. ${ms}^{-2}$

Q.

The heart is pumping blood at $x\mathrm{kg}$ per unit time, with constant velocity $v$. The force needed is

1. $xv$

2. $v\frac{dx}{dt}$

3. $x\frac{dv}{dt}$

4. zero

Q.

Strength of the force is expressed by its ____________

Q. One parsec is equal to ______ light years.

1. 2.36
2. 3.62
3. 3.26
4. 6.32

Q. The units which are obtained from the products and ratios of the fundamental units are known as?

1. Base units
2. Simple units
3. Derived units
4. Complex units

Q.

Force can be measured in:

Q. SI unit of surface tension is:

1. $N{m}^{-1}$
2. $N{m}^{-2}$
3. $Nm$
4. $N{m}^2$

Q. The SI unit of work is same as that of:

1. Force
2. Power
3. Energy
4. Momentum

Q. The velocity of a particle depends upon as $v=a+bt+c{t}^2$ where $t$ is time. The units of $a$ and $b$ can be:

1. a: $m/s$
   b: $m/s^2$
2. a: $cm/s$
   b: $cm/s^2$
3. a: $m/s$
   b: $m/s$
4. a: $cm/s^2$
   b: $cm/s^2$

Q. What is the SI unit of pressure ?

1. Kilogram
2. newton
3. pascal
4. dyne

Q. An iron block has a length of $20cm$, breadth of $10cm$ and height of $5cm$. Its volume is:

1. $100c{m}^3$
2. $1000c{m}^3$
3. $500c{m}^3$
4. $1000c{m}^2$

Q.

A body of mass $10kg$ is moving with a velocity of $4m{s}^{-1}$. Find the kinetic energy and momentum of the body respectively.

1. $400J$ and $40kgm{s}^{-1}$

2. $80J$ and $160kgm{s}^{-1}$

3. $80J$ and $40kgm{s}^{-1}$

4. $200J$ and $160kgm{s}^{-1}$

Q.

A coin is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10$m/s^2$, with what velocity and after what time will it strike the ground?

1. 20m/s, 2s

2. 10m/s, 1 s

3. 30m/s, 2s

4. 20m/s, 5s

Q. The average of all solar days in which the earth completes one revolution around the sun is called ____.

1. Millenium
2. Mean solar day
3. Hour
4. Solar day

Q. The SI unit of momentum is $m{s}^{-1}$

1. True
2. False

Q.

Arun is travelling with his friends in a car. The car suddenly stops due to some problem in the engine. If Arun and his friends apply a force of 1000 N to drag the car to the nearest garage that is 1.2 km from that place, determine the total power required if the dragging time is 20 minutes.

1. 2000 W

2. 3000 W

3. 1000 W

4. 500 W

Q. Name the S.I. unit of electrical energy.

1. kWh
2. J.sec
3. W
4. kW/h

Q.

Mention the S.I. unit of force.

Q. The SI unit of energy is.

1. newton
2. joule
3. pascal

Q. The SI unit of pressure is:

1. $N$
2. $N{m}^2$
3. $Pa$
4. $N{m}^{-1}$

Q.

A water pump pumps water to a height of 20 m at the rate of 2 kg/s. What is the mechanical power developed by the power? $(g=10m/s^2)$

1. 10.3 m

2. 8.3 m

3. 9.3 m

4. 5.3 m

Q.

The meteorological unit of pressure is bar. One bar is equal to:

1. 10⁵ Pascal

2. 10⁶ Pascal

3. 10⁴ pascal

4. 10³ Pascal

Q. Arrange the following lengths in increasing order of their magnitude.
I. 1 Angstrom
II. 1 Micro
III. 1 Fermi
IV. 1 Light year

1. III, I, II, IV
2. I, II, III, IV
3. III, II, I, IV
4. II, III, I, IV

Q.

Naresh having own mass of 40kg climbs 20m along with 20kg of bagpack on his shoulders in 40s. Calculate his power and work done.

1. 30 W

2. 300 W

3. 15 W

4. 150 W

Q.

Calculate the volume of a book which is 25cm in length, 12cm in breadth and 2cm in height in $m^3$.

1. 6$\times$${10}^{-4}$$m^3$

2. 6$\times$${10}^{-4}$$c{m}^3$

3. 12$\times$${10}^{-6}$$m^3$

4. 6$\times$${10}^{-6}$$m^3$

Q. At what temperature do Celsius and Fahrenheit scales coincide?

1. -30 degrees
2. -40 degrees
3. -20 degrees
4. -10 degrees

Q.

The product of mass and velocity is called:

1. momentum

2. acceleration

3. force

4. weight

Q. $kgm{s}^{-2}$ is the unit of:

1. Force
2. Impulse
3. Pressure
4. Inertia

Q. Newton-metre is the SI unit of which of the following quantities?

1. Power
2. Acceleration
3. Work
4. Force

Q. The velocity of a particle depends upon as $v=a+bt+c{t}^2$ where $t$ is time. The units of $a$ and $b$ can be:

1. a: $m/s$
   b: $m/s^2$
2. a: $cm/s$
   b: $cm/s^2$
3. a: $m/s$
   b: $m/s$
4. a: $cm/s^2$
   b: $cm/s^2$