Related Questions

The angle of inclination of the plane, at which the body begins to move down the plane is called
A angle of friction
B angle of repose
C angle of projection
D none of the mentioned
A body will begin to move down an inclined plane, if the angle of inclination of the plane is ________ the angle of friction.
A Equal to
B Less than
C Greater than
D None of these
A body will begin to move down an inclined plane if the angle of inclination of the plane is _________ the angle of friction.
A Equal to
B Less than
C Greater than
D None of these
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)
A P = W tanα
B P = W tan (α + φ)
C P = W (sinα + μcosα)
D P = W (cosα + μsinα)
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of
A Friction
B Limiting friction
C Repose
D Kinematic friction
Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction
A Along the plane
B Horizontally
C Vertically
D At an angle equal to the angle of friction to the inclined plane
The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.
A Equal to
B Less than
C Greater than
D None of these
Mr. Ali decided to walk down the escalator of a tube station. He found that if he walks down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34 stairs he would only require 18 seconds to get to the bottom. If the time is measured from the moment the top step begins to descend to the time he steps off the last step at the bottom, find out the height of the stair way in steps?
A 23 steps
B 16 steps
C 46 steps
D 26 steps
For the given values of initial velocity of projection and angle of inclination of the plane, the maximum range for a projectile projected upwards will be obtained, if the angle of projection is
A $$\alpha = \frac{\pi }{4} - \frac{\beta }{2}$$
B $$\alpha = \frac{\pi }{2} + \frac{\beta }{2}$$
C $$\alpha = \frac{\beta }{2} - \frac{\pi }{2}$$
D $$\alpha = \frac{\pi }{4} - \frac{\beta }{4}$$
E $$\alpha = \frac{\pi }{2} - \frac{\beta }{2}$$
The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$

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