Question

When the mass is halved and the velocity is doubled, the kinetic energy of the object?​

Answer 1

Answer:

Let, mass = m,

m, speed = v

v KE1= (1/2)mv²

now,

• mass= m/2,
• mass= m/2, speed= 2v

mass= m/2, speed= 2v KE2 = (1/2) × (m/2) ×(2v)²

=mv² = 2KE1,

i.e., double of initial energy.

Answer: Expl: New KE = 1/2.