Q. No.A batsman hits back a ball of mass 0.4 kg straight in the direction of the bowler without changing its initial speed of 15 ms–1. The impulse imparted to the ball is:
1. 10 Ns
2. 11 Ns
3. 12 Ns
4. 13 Ns
1. 10 Ns
2. 11 Ns
3. 12 Ns
4. 13 Ns
Subtopic: Newton's Laws |
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A balloon has a mass of 10 g in the air. The air escapes from the balloon at a uniform rate with a velocity of 4.5 cm/s. If the balloon shrinks in 5 s completely. Then, the average force acting on that balloon will be (in dyne).
1. 3
2. 9
3. 12
4.18
1. 3
2. 9
3. 12
4.18
Subtopic: Newton's Laws |
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A player caught a cricket ball of mass \(\mathrm{150 ~g}\) moving at a speed of \(20 \mathrm{~m} / \mathrm{s}.\) If the catching process is completed in \(\mathrm{0.1 ~s ,}\) the magnitude of force exerted by the ball on the hand of the player is:
1. \(\mathrm{150 ~N}\)
2. \(\mathrm{3 ~N}\)
3. \(\mathrm{30~N}\)
4. \(\mathrm{300~N}\)
1. \(\mathrm{150 ~N}\)
2. \(\mathrm{3 ~N}\)
3. \(\mathrm{30~N}\)
4. \(\mathrm{300~N}\)
Subtopic: Newton's Laws |
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A bullet of mass \(10\) g is fired from a gun (mass of \(10\) kg without a bullet) with a speed of \(100\) m/s. The recoil speed of the gun is:
| 1. | \(\dfrac{1}{10}\) m/s | 2. | \(\dfrac{1}{5}\) m/s |
| 3. | \(\dfrac{5}{2}\) m/s | 4. | \(\dfrac{2}{5}\) m/s |
Subtopic: Newton's Laws |
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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
Subtopic: Newton's Laws |
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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
Subtopic: Newton's Laws |
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AIPMT - 2009
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If a body of mass \(5 ~\text {kg}\) is in equilibrium due to forces \(F_1, F_2\) and \(F_3 . F_2\) and \(F_3\) are perpendicular to each other. If \(F_1\) is removed then find the acceleration of body. Given: \(F_2 = 6~\text N\) and \(F_3 = 8~\text N\)
1. \(2~\text{ m/s}^2\)
2. \(3~\text{ m/s}^2\)
3. \(4~\text{m/s}^2\)
4. \(5~ \text{m/s}^2\)
1. \(2~\text{ m/s}^2\)
2. \(3~\text{ m/s}^2\)
3. \(4~\text{m/s}^2\)
4. \(5~ \text{m/s}^2\)
Subtopic: Newton's Laws |
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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. \(Mv\)
Subtopic: Newton's Laws |
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AIPMT - 2011
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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
Subtopic: Newton's Laws |
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A ball of mass 0.15 Kg hits the wall with its initial speed of 12 ms-1 and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is 100 N. calculate the time duration of the contact of ball with the wall.
1. 0.018 s
2. 0.036 s
3. 0.009 s
4. 0.072 s
1. 0.018 s
2. 0.036 s
3. 0.009 s
4. 0.072 s
Subtopic: Newton's Laws |
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Level 1: 80%+
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