A truck and a car are moving with equal velocity. If equal retarding force is applied on each, then on applying the brakes both will stop after certain distance 

1. Truck will cover less distance before rest

2. Car will cover less distance before rest

3. Both will cover equal distance

4. None

A constant force acts on a body of mass \(0.9\ \text{kg}\) at rest for \(10\ \text{s}\). If the body moves a distance of \(250\ \text{m}\), the magnitude of the force is:

1. \(3\ \text{N}\)

2. \(3.5\ \text{N}\)

3. \(4.0\ \text{N}\)

4. \(4.5\ \text{N}\)

A body of \(5\ \text{kg}\) is moving with a velocity of \(20\ \text{m/s}\). If a force of \(100\ \text{N}\) is applied to it for \(10\ \text{s}\) in the same direction as its velocity, what will now be the velocity of the body?

1. \(200\ \text{m/s}\)

2. \(220\ \text{m/s}\)

3. \(240\ \text{m/s}\)

4. \(260\ \text{m/s}\)

A cyclist turns around a curve at \(15\ \text{miles/hour}\). If he turns at double the speed, the tendency to overturn is:

1. Doubled
2. Quadrupled
3. Halved
4. Unchanged

If the overbridge is concave instead of being convex, the thrust on the road at the lowest position will be:
1. \(mg+\dfrac{mv^2}{r}\)
2. \(mg-\dfrac{mv^2}{r}\)
3. \(\dfrac{mv^2g}{r}\)
4. \(\dfrac{v^2g}{r}\)

A car sometimes overturns while taking a turn. When it overturns, it is:

1. the inner wheel which leaves the ground first.

2. the outer wheel which leaves the ground first.

3. both the wheels leave the ground simultaneously.

4. either wheel leaves the ground first.

A motorcyclist moving with a velocity of \(72\ \text{km/h}\) on a flat road takes a turn on the road at a point where the radius of curvature of the road is \(20\ \text{m}\). The acceleration due to gravity is \(10\ \text{m/s}^2\). To avoid skidding, he must not bend with respect to the vertical plane by an angle greater than:

1. \(𝜃=\tan^{−1}6\)

2. \(𝜃=\tan^{−1}2\)$\mathrm{}$

3. \(𝜃=\tan^{−1}25.92\)$$

4. \(𝜃=\tan^{−1}4\)$$

A particle moves in a circular orbit under the action of a central attractive force inversely proportional to the distance \(r\). The speed of the particle is:

1. Proportional to \(r^2\)

2. Independent of \(r\)

3. Proportional to \(r\)

4. Proportional to \(\dfrac 1r\)

Two masses \(M\) and \(m\) are attached to a vertical axis by weightless threads of combined length \(l\). They are set in rotational motion in a horizontal plane about this axis with constant angular velocity \(ω\). If the tensions in the threads are the same during motion, the distance \(x\) of \(M\) from the axis is:

1. \(\dfrac{Ml}{M+m}\)

2. \(\dfrac{ml}{M+m}\)

3. \(\dfrac{M+m}{M}l\)

4. \(\dfrac{M+m}{m}l\)

A \(500\ \text{kg}\) car takes a round turn of radius \(50\ \text{m}\) with a velocity of \(36\ \text{km/h}\). The centripetal force is:

1. \(250\ \text{N}\)

2. \(750\ \text{N}\)

3. \(1000\ \text{N}\)

4. \(1200\ \text{N}\)