Physics Test 74

Result

Physics Test 74

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Weekly Quiz Competition

Question 1
4 / -1

An isolated particle of mass m is moving in horizontal plane (x-y) along the axis at certain height above the ground. It suddenly explodes into two fragments of masses 3/d & 3m/4 . An instant later, the smaller fragment is at y = +15 cm. The larger fragment at this instant is at:

A
y = –5 cm

B
y = +20 cm

C
y = +5 cm

D
y = –20 cm

Solution

m₁y₁ + m₂y₂ – O

= y₂ = –5 cm
Question 2
4 / -1

An impulse J₁ is imparted when a cricket ball is hitted with a bat by a person. The person hits the ball again but with half the force. Also the bat & ball are in contact for half of the time as in the first case. Then new impulse is J₂. Then:

A
J₂ = J₁/2

B
J₂ = J₁

C
J₂ = j₁ / 4

D
J₂ = 4J₁