If the force acting on a system is zero, the quantity which remains constant is:

1.	Force	2.	Linear momentum
3.	Speed	4.	Kinetic energy

Two blocks, A and B, of masses 2m and 4m are connected by a string. The block of mass 4m is connected by a spring (massless). The string is suddenly cut. The ratio of the magnitudes of accelerations of masses 2m and 4m at that instant will be:

The reading of spring balance in the depicted figure will be:

The angle of banking for a cyclist taking a turn at a curve is given by tan$\mathrm{\theta } = \frac{{\mathrm{v}}^{\mathrm{n}}}{\mathrm{rg}}$ where symbols have their usual meaning. The value of n is:

The maximum constant speed with which a car can move on a flat horizontal circular road with the radius of curvature 20 m and a coefficient of static friction 0.5 is: (g = 10 $\mathrm{m}/{\mathrm{s}}^2$)

A 100 kg gun fires a ball of 1 kg horizontally from a cliff at a height of 500 m. It falls on the ground at a distance of 400 m from the bottom of the cliff. The recoil velocity of the gun is: (Take g = 10 m/s²)

1. 0.2 m/s

2. 0.4 m/s

3. 0.6 m/s

4. 0.8 m/s

A metal sphere is suspended from a wall by a string. The forces acting on the sphere are shown in the figure. Which of the following statements is NOT correct?
   $\mathrm{}$

Calculate the reading of the spring balance shown in the figure: (take \(g=10\) m/s²)
                

1. \(60\) N
2. \(40\) N
3. \(50\) N
4. \(80\) N

In the diagram, a 100 kg block is moving up with constant velocity. Find out the tension at point P.

1. 1330 N

2. 490 N

3. 1470 N

4. 980 N

If a young man of mass 60 kg stands on the floor of a lift which is accelerating downwards at 1 $\mathrm{m}/{\mathrm{s}}^2$, then the reaction of the floor of the lift on the man will be: (g=9.8$\mathrm{m}/{\mathrm{s}}^2$)