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:
1. | 1: 2 | 2. | 2: 1 |
3. | 1: 4 | 4. | 4: 1 |
The reading of spring balance in the depicted figure will be:
1. | 0 N | 2. | 20 N |
3. | 10 N | 4. | 5 N |
The angle of banking for a cyclist taking a turn at a curve is given by tan where symbols have their usual meaning. The value of n is:
1. | 1
|
2. | 2
|
3. | 3
|
4. | 4 |
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 )
1. | 36 km/h | 2. | 54 km/h |
3. | 72 km/h | 4. | 90 km/h |
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?
1. |
\(\overrightarrow N+\overrightarrow T+\overrightarrow W=0\) |
2. | \(T^2=N^2+W^2\) |
3. | \(T = N + W\) | 4. | \(N = W \tan \theta\) |
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 \(1~\text{m/s}^2\), then the reaction of the floor of the lift on the man will be: \(\left(g = 9.8~\text{m/s}^2 \right)\)
1. | \(528\) N | 2. | \(540\) N |
3. | \(546\) N | 4. | None of these |