A. 0
B. 89N
C. 9.8 N
D. 10N
Related Mcqs:
- A body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g=10 ?
A. 15 m
B. 20 m
C. 5 m
D. 25 m - Distance covered by a freely falling body in 2 seconds will be__________________?
A. 4.9 m
B. 19.6 m
C. 39.2 m
D. 44.1 m - 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 - A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is_______________?
A. mg
B. mg – ma
C. mg + ma
D. mg – ma - If a current carrying solenoid is suspended freely it will__________________?
A. be rotating
B. come to rest in N-S direction
C. vibrating like galvanometer needle
D. comes to rest after rotation - A simple pendulum suspended from the ceiling of a lift has time period T when the lift is at rest. When the lift falls freely, the time period is_________________?
A. Infinite
B. T/g
C. Zero
D. g/T - 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 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 - A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ?
A. 1/4f
B. 1/2f
C. frequency lower than 20 Hz
D. 2f - 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
Advertisement