(D) Initial momentum $P_1 = 10 \, kg \cdot m/s$.Force $F = 0.2 \, N$ acts for time $t = 10 \, s$.Change in momentum $\Delta P = F \times t = 0.2 \time

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(D) Initial momentum $P_1 = 10 \, kg \cdot m/s$.Force $F = 0.2 \, N$ acts for time $t = 10 \, s$.Change in momentum $\Delta P = F \times t = 0.2 \times 10 = 2 \, kg \cdot m/s$.Final momentum $P_2 = P_1 + \Delta P = 10 + 2 = 12 \, kg \cdot m/s$.Kinetic energy $K = \frac{P^2}{2m}$.Increase in kinetic energy $\Delta K = \frac{P_2^2 - P_1^2}{2m}$.$\Delta K = \frac{12^2 - 10^2}{2 \times 5} = \frac{144 - 100}{10} = \frac{44}{10} = 4.4 \, J$.

Class 11 Physics Newton's Laws of Motion and Friction Third Law of Motion and Momentum and Impulse

Medium

$A$ body of mass $5 \, kg$ is moving with a momentum of $10 \, kg \cdot m/s$. $A$ force of $0.2 \, N$ acts on it in the direction of motion of the body for $10 \, seconds$. The increase in its kinetic energy is ............... $J$.

A
$2.8$
B
$3.2$
C
$3.8$
D
$4.4$

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Class 11

Physics Questions

Chapter

Newton's Laws of Motion and Friction

Subtopic

Third Law of Motion and Momentum and Impulse

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MediumAIIMS 2019

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$A$ cricket ball of mass $500\, g$ collides with a bat with speed $15\, m/s$ and returns with the same speed within $0.01\, s$. The force acted on the bat is ............ $N$.

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$A$ ball hits a vertical wall horizontally at $10 \ m/s$ and bounces back at $10 \ m/s$. Which of the following statements is correct?

Easy

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$A$ body of mass $5 \, kg$ is moving with a momentum of $10 \, kg \cdot m/s$. $A$ force of $0.2 \, N$ acts on it in the direction of motion of the body for $10 \, seconds$. The increase in its kinetic energy is ............... $J$.

Similar Questions

Consider the following statement: When jumping from some height,you should bend your knees as you come to rest,instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement?

$A$ gun applies a force $F$ on a bullet which is given by $F = (100 - 0.5 \times 10^{5} t) \ N$. The bullet emerges out with a speed of $400 \ m/s$. Find the impulse exerted until the force on the bullet becomes zero (in $N \cdot s$).

$A$ cricket ball of mass $500\, g$ collides with a bat with speed $15\, m/s$ and returns with the same speed within $0.01\, s$. The force acted on the bat is ............ $N$.

Why does a child feel more pain when she falls down on a hard cement floor,than when she falls on the soft muddy ground in the garden?

$A$ ball hits a vertical wall horizontally at $10 \ m/s$ and bounces back at $10 \ m/s$. Which of the following statements is correct?

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