Ifva partie of mass 20 g moving with speed 90 km/hr after two minutes its speed becomes 108 km /he - Science - Work and Energy

Question

Ifva partie of mass 20 g moving with speed 90 km/hr after two
minutes its speed becomes 108 km /he Find the power consume by the
particle during the motion

Vipra Mishra · Accepted Answer

Dear Student

Power is equal to change in energy /time
P =Change in kinectic energyTimeP=12mv22-v12t =12×0
02302-2522×60   (convert km/hr to m/s and g to kg)P=12×0
02900-625120=0 23 W
Regards

Ifva partie of mass 20 g moving with speed 90 km/hr after two minutes its speed becomes 108 km /he .Find the power consume by the particle during the motion