Physics GK 05 – Work, Energy and Power

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Which of the following is NOT correct about an inelastic collision?

Linear momentum is conserved

Kinetic energy is conserved

Total energy is conserved

Some or all the forces involved may be non-conservative in nature

The dot product of two vectors A and B is equal to the product of magnitude of A and B and __________?

cosine of the largest angle between them

sine of the largest angle between them

cosine of the smallest angle between them

sine of the smallest angle between them

What is the dot product of two perpendicular vectors?

-1

1/2

Work done is defined as the dot product of which of the following vectors?

Force and acceleration

Force and area

Force and instantaneous velocity

Force and displacement

What is the dimensional formula of work done?

M1 L1 T-1

M1 L2 T-1

M1 L-1 T-2

M1 L2 T-2

Physics GK 05 - Work, Energy and Power