Work And Energy Test

Result

Work And Energy Test - 9

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

he following question has four choices out of which ONLY ONE is correct.

Two objects collide. No external forces act on the bodies during the collision. The velocities of the objects before and after the collision are given in the table below.

Velocities before collision Velocities after collision

u₁ = + 6 ms^-1 v₁ = -3.5 ms^-1

u₂ = - 2 ms^-1 v₂ = + 2.5 ms^-1

The ratio of the masses of the two objects is:

A
9 : 19

B
11 : 9

C
11 : 17

D
13 : 15

Solution

Using conservation of linear momentum
m₁u₁+ m₂u₂ = m₁v₁+ m₂v₂
6m₁+ (-2)m₂= (-3.5)m₁+ 2.5m₂
6m₁+ 3.5m₁= 2.5m₂+ 2m₂
m₁/m₂= 9:19