Q. No.1. \(4500~\text{J}\)
2. \(5000~\text{J}\)
3. \(4200~\text{J}\)
4. \(4000~\text{J}\)
A rigid body moves a distance of \(10\) m along a straight line under the action of a force of \(5\) N. If the work done by this force on the body is \(25~\text{J}\), the angle which the force makes with the direction of motion of the body is:
| 1. | \(0^{\circ}\) | 2. | \(30^{\circ}\) |
| 3. | \(60^{\circ}\) | 4. | \(90^{\circ}\) |
A man pushes a wall and fails to displace it. He does:
| 1. | negative work |
| 2. | positive but not maximum work |
| 3. | no work at all |
| 4. | maximum work |
1. \(250 \pi^2\)
2. \(100 \pi^2\)
3. \(5 \pi^2\)
4. 0
What is the work done on the disc by the spring during one full circle?
| 1. | \(0~\text J\) | 2. | \(94~\text J\) |
| 3. | \(186~\text J\) | 4. | \(314~\text J\) |
A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is
(1) 0°
(2) 30°
(3) 60°
(4) 90°
A body constrained to move in y-direction is subjected to a force given by . The work done by this force in moving the body a distance of 10 m along the y-axis is
1. 20 J
2. 150 J
3. 60 J
4. 190 J
| 1. |  |
2. |  |
| 3. |  |
4. |  |
A particle of mass m at rest is acted upon by a force F for a time t. Its Kinetic energy after an interval t is
(1)
(2)
(3)
(4)
If the position x of a particle as a function of time t is given by , then the kinetic energy of the particle with time for t > 0 is:
(1) decreasing.
(2) constant.
(3) increasing.
(4) unpredictable.
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