As per the given figure,a small ball P slides | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) $1$. The ball $P$ slides down a height $h = 20\,cm = 0.2\,m$.$2$. By the law of conservation of energy,the velocity $v_P$ of ball $P$ just before

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(C) $1$. The ball $P$ slides down a height $h = 20\,cm = 0.2\,m$.$2$. By the law of conservation of energy,the velocity $v_P$ of ball $P$ just before the collision is given by $v_P = \sqrt{2gh}$.$3$. Substituting the values: $v_P = \sqrt{2 	imes 10 	imes 0.2} = \sqrt{4} = 2\,m/s$.$4$. Since the collision is elastic and the masses of the two balls are equal,the velocities are interchanged after the collision.$5$. Before the collision,ball $P$ has velocity $v_P = 2\,m/s$ and ball $Q$ is at rest $(v_Q = 0)$.$6$. After the collision,ball $P$ comes to rest $(v_P' = 0)$ and ball $Q$ moves with the velocity that ball $P$ had before the collision $(v_Q' = v_P = 2\,m/s)$.

Similar Questions

$A$ body of mass $30 \ kg$ moving with a velocity $20 \ ms^{-1}$ undergoes a one-dimensional elastic collision with another ball of the same mass moving in the opposite direction with a velocity of $30 \ ms^{-1}$. After the collision,the velocities of the first and second bodies respectively are:

$A$ body of mass $1\,kg$ collides head-on elastically with a stationary body of mass $3\,kg$. After the collision,the smaller body reverses its direction of motion and moves with a speed of $2\,m/s$. The initial speed of the smaller body before the collision is $..........\,m/s$.

$A$ car of mass $400 \ kg$ is moving with a speed of $72 \ km/h$. It collides with a truck of mass $4000 \ kg$ moving in the same direction with a speed of $9 \ km/h$. After the collision,the car rebounds with a speed of $18 \ km/h$. Find the speed of the truck after the collision in $km/h$.

$A$ neutron makes a head-on elastic collision with a stationary deuteron. The fractional energy loss of the neutron in the collision is

Statement-$1$: In an elastic collision between two bodies,the relative speed of the bodies after the collision is equal to the relative speed of the bodies before the collision.
Statement-$2$: In an elastic collision,the linear momentum of the system is conserved.

Vedclass Test Series

Exam Paper Generator

Online Exam Module