A ball of mass 0.15 kg hits wall with its initial speed of 12 ms ^{-1} and bounces back without chan

English

Gujarati

Hindi

4-1.Newton's Laws of Motion

medium

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 $.........cm$

A

$0.018$

B

$0.036$

C

$0.009$

D

$0.072$

(JEE MAIN-2022)

Solution

$\overrightarrow{ P }_{ i }=0.15 \times 12(\hat{\hat{i}})$

$\overrightarrow{ P }_{ f }=0.15 \times 12(-\hat{ i })$

$|\overrightarrow{ P }|=3.6 kg – m / s$

$3.6= F \Delta t$

$3.6=100 \Delta t$

$\Delta t =0.036\,sec$

Standard 11

Physics

Share

Similar Questions

A ball of mass $0.15\, \mathrm{~kg}$ is dropped from a height $10\, \mathrm{~m}$, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is $\left(\mathrm{g}=10 \,\mathrm{~m} / \mathrm{s}^{2}\right)$ nearly : (In $\mathrm{kg}\, \mathrm{m} / \mathrm{s}$)

medium

(NEET-2021)

What is impulse of force ? Write its unit and dimension.

medium

In a tug-of-war contest, two men pull on a horizontal rope from opposite sides. The winner will be the man who

medium

A bullet is fired from a gun. The force on the bullet is given by $F = 600 – 2 \times {10^5}t$, where $F$ is in newtons and $t$ in seconds. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet ……….. $N-s$

hard

(AIPMT-1998)

A batsman deflects a ball by an angle of $45^o$ without changing its initial speed which is equal to $54\; km/h$. What is the impulse imparted to the ball in $kg\;m/s$? (Mass of the ball is $0.15 \;kg.)$

medium