Question

Force f=(2i+j+k)n is acting on particle moving with constant velocity v=(i+2j+k)m/s.Power delivered by force is

Answer 1

Force f=(2i+j+k)N is acting on particle moving with constant velocity v = (i+2j+k)m/s.Power delivered by force is

answer : 5 watt

power is the dot product of force applied on body and velocity of body.

i.e., P = F.v

where P is lower delivered by force, F is force applied on the body and v is velocity of body.

given, F = (2i + j + k) N and v = (i + 2j + k) m/s

so, P = (2i + j + k).(i + 2j + k)

= 2 × 1 + 1 × 2 + 1 × 1

= 2 + 2 + 1

= 5 Watt

hence, power delivered by force is 5watt.

Answer 2

Answer:5 watt

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HOPE IT HELPS!!!