Question

two objects of masses 2×10³kg and 4×10³ kg have equal momentum.what is the ratio of their knowledge kinetic energies​

Answer 1

Answer:

4:1

Explanation:

Step1

According to the conservation of momentum, the two objects have equal momentum.

Substitute the values of the masses for two objects in above relation.

p1 = p2

m1v1 = m2v2

(1×10^3 kg) v1 = (4×10^3 kg) v2

v2/v1 = (4×10^3 kg) / (1×10^3 kg)

= 4

Step2

The ratio of kinetic energies of two objects is,

Substitute the value...

KE1/KE2 = 1/2m1v1^2 / 1/2m2v2^2

= m1v1^2/m2v2^2

= m1/m2 (v1/v2)^2

KE1/KE2 = 1×10^3 kg/ 4×10^3kg (4)^2

= 1/4 ×16

= 4

= 4:1

Hope this help u!!

Answer 2

Answer:

1:2

Explanation:

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