Question

1. Mechanical advantage refers to [ ]
a) How a simple machine keeps forces the same
b) How much a simple machine increases the force being applied
c) How much a simple machine reduces input force
d) How much a simple machine decreases the force being applied
2. In a 1st class lever the fulcrum should be placed [ ]
a) As close to the effort as possible
b) As close to the load as possible
c) As close to the load as possible
d) As far to the load as possible
3. Js is the unit of [ ]
a) Energy b) Angular momentum c) Momentum d) Power
4. 1 micron = ______ nano meter [ ]
a) 10–6 b) 10–10 c) 103 d) 10–3
5. Force acts on an object may change [ ]
a) Direction b) Shape c) Speed d) All of above
6. Leaves or fruits fall on the ground due to [ ]
a) Magnetic force b) Gravitational force
c) Electrostatic force d) Muscular force
7. An object of mass 100 kg is accelerated uniformly from a velocity of 4 m/s to 8 m/s in 2 seconds.
The force acting on the object is [ ]
a) 200 N b) 100 N c) 50 N d) 800 N
8. The following is a dimensionless quantity [ ]
a) power b) potential c) work d) plane angle
9. One shake is equal to [ ]
a) 108 m b) 10–8 s c) 10–10 m d) 10–10 s
10. The dimensional formula of velocity is [ ]
a) [M1
L1 T
–1] b) [M1
L1 T
–1] c) [M0
L1 T
–1] d) [M1
L0 T
–1]

Answer 1

(1)- a.

(2)- d.

(3)- b

(4)- c

(5)- d.

(6)- b.

(7)- a.

(8)- b.

(9)- a.

(10)- c.

Answer 2

1. a
2. b
3. c
4. d
5. a
6. b
7. c
8. d
9. a
10. b

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