When a body slides down an inclined surface, the acceleration (f) of the body, i

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Question
When a body slides down an inclined surface, the acceleration (f) of the body, is given by
Options
A. f = g
B. f = g sin ?
C. f = g cos ?
D. f = g tan ?.

Correct Answer

f = g sin ?

Applied Mechanics problems

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1. If a ball which is dropped from a height of 2.25 m on a smooth floor attains the height of bounce equal to 1.00 m, the coefficient of the restitution between the ball and floor, is
Options
A. 0.25
B. 0.50
C. 0.67
D. 0.33
E. 0.75

2. On a mass m describing a circular path of radius r, the centrifugal force
Options
A. acts tangentially to the circular path
B. acts towards the centre of rotation
C. acts away from the centre of rotation
D. is

4. Pick up the incorrect statement from the following. In a simple harmonic motion
Options
A. velocity is maximum at its mean position
B. velocity is minimum at the end of the storke
C. acceleration is minimum at the end of the stroke
D. acceleration is zero at the mean position.

5. The displacement of a particle which moves along a straight line is given by S = 4t³ + 3t² - 10 where S is in meters and t is in seconds. The time taken by the particle to acquire a velocity of 18 m/sec from rest, is
Options
A. sec
B. 1 sec
C. 1.5 sec
D. 1.5 sec.

8. A particle moving with a simple harmonic motion, attains its maximum velocity when it passes
Options
A. the extreme point of the oscillation
B. through the mean position
C. through a point at half amplitude
D. none of these.

10. The centre of gravity of a homogenous body is the point at which the whole
Options
A. volume of the body is assumed to be concentrated
B. area of the surface of the body is assumed to be concentrated
C. weight of the body is assumed to be concentrated
D. all the above.

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