Questions in Laws of Motion

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A plumb line is suspended from a ceiling of a car moving with horizontal acceleration of a. What will be the angle of inclination with vertical
Mass of a person sitting in a lift is 50 kg. If lift is coming down with a constant acceleration of 10 $m/se{c^2}.$ Then the reading of spring balance will be $(g = 10m/se{c^2})$
A body of mass 2 kg has an initial velocity of 3 meters per second along OE and it is subjected to a force of 4 N in a direction perpendicular to OE. The distance of the body from O after 4 seconds will be
A block of mass m is placed on a smooth wedge of inclination $\theta $. The whole system is accelerated horizontally so that the block does not slip on the wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be
A machine gun fires a bullet of mass 40 g with a velocity $1200\,\,m{s^{ - 1}}.$ The man holding it can exert a maximum force of 144 N on the gun. How many bullets can he fire per second at the most
An automobile travelling with a speed of $60\,\,km/h,$ can brake to stop within a distance of 20 m. If the car is going twice as fast, i.e. 120 km/h, the stopping distance will be
A man of weight 75 kg is standing in an elevator which is moving with an acceleration of $5\,m/{s^2}$ in upward direction the apparent weight of the man will be $(g = 10\,\,m/{s^2})$
The adjacent figure is the part of a horizontally stretched net. section AB is stretched with a force of 10 N. The tensions in the sections BC and BF are Question Image
The linear momentum p of a body moving in one dimension varies with time according to the equation $p = a + b{t^2}$ where a and b are positive constants. The net force acting on the body is
The spring balance inside a lift suspends an object. As the lift begins to ascent, the reading indicated by the spring balance will

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