A. mg
B. mg – ma
C. mg + ma
D. mg – ma
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Related Mcqs:
- A body of 2 kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be______________?
A. 9.8 N
B. 19.6 N
C. 129.4 N
D. 39.2 N - If a lift is going up with acceleration, the apparent weight of a body is:
A. More than the true weight
B. More or less the true weight
C. Less than the true weight
D. Equal to the true weightSubmitted by: Naveed Tahir
- An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is_________________?
A. 3.5 x 10-3 J
B. 3.5 x 104 J
C. 3.5 x 106 J
D. 3.5 x 109 J - A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ?
A. man does more work than child
B. child does more work than man
C. both do the same amount of work
D. it is a foolish question - A man standing near a fast moving train may fall___________?
A. On the train
B. Away from the train
C. Towards the train
D. On himself - The acceleration of a projection on the diameter for a particle moving along a circle is_______________?
A. w2x
B. wx2
C. w2x
D. wx2 - A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ?
A. 0.01J
B. 0.02J
C. 0.04J
D. 1.0J - The relation between linear and angular acceleration is______________?
A. a = a x r
B. a = r x a
C. a = a x r
D. r = a x a - In case of planets the necessary acceleration is provided by______________?
A. Gravitational force
B. Frictional force
C. Coulomb force
D. Centripetal force - The acceleration in the rocket at any instant is proportional to the nth power of the velocity of the expelled gases. Where the value of n must be ?
A. -1
B. 1
C. 2
D. -2
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