Q. No.1. 10 Ns
2. 11 Ns
3. 12 Ns
4. 13 Ns
1. 3
2. 9
3. 12
4.18
1. \(\mathrm{150 ~N}\)
2. \(\mathrm{3 ~N}\)
3. \(\mathrm{30~N}\)
4. \(\mathrm{300~N}\)
| 1. | \(\dfrac{1}{10}\) m/s | 2. | \(\dfrac{1}{5}\) m/s |
| 3. | \(\dfrac{5}{2}\) m/s | 4. | \(\dfrac{2}{5}\) m/s |
The speed of a 5 kg body is reduced from 65 m/s to 15 m/s in 2 s. The average resisting force acting is:
(1) 125 N
(2) 1250 N
(3) 12.5 N
(4) 200 N
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A body, under the action of a force \(\overset{\rightarrow}{F} = 6 \hat{i} - 8 \hat{j} + 10 \hat{k}\), acquires an acceleration of 1 ms-2. The mass of this body must be:
1. 2 √10 kg
2. 10 kg
3. 20 kg
4. 10 √2 kg
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1. \(2~\text{ m/s}^2\)
2. \(3~\text{ m/s}^2\)
3. \(4~\text{m/s}^2\)
4. \(5~ \text{m/s}^2\)
A body of mass \(M\) hits normally a rigid wall with velocity \(v\) and bounces back with the same velocity. The impulse experienced by the body is:
1. \(1.5Mv\)
2. \(2Mv\)
3. zero
4. \(Mv\)
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A body of mass of 4 kg is acted upon by a force that varies as shown in the graph below.
The momentum acquired is:
1. 280 N–s
2. 140 N–s
3. 70 N–s
4. 210 N–s
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1. 0.018 s
2. 0.036 s
3. 0.009 s
4. 0.072 s
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