Respuesta :
Answer:
826.17 watt
Explanation:
The rate of doing work is defined as the power.
Power is the ratio of work done to the time taken.
It is a scalar quantity and its SI unit is watt.
mass, m = 161 kg
v 7.4 m/s
F = 138 N
Ф = 36°
Power,
P = F x v x CosФ
P = 138 x 7.4 x Cos 36
P = 826.17 watt
Answer:
[tex]power\ = 826.17 Watt[/tex]
Explanation:
given,
mass of the block = 161 kg
speed of the block = 7.4 m/s
force applied = 138 N
at an angle of = 36°
Rate of change of force is equal to work on the block is power
[tex]power\ = F_p \times v[/tex]
[tex]power\ = F cos\theta\times v[/tex]
[tex]power\ = 138 cos36^0\times 7.4[/tex]
[tex]power\ = 826.17 Watt[/tex]
the rate at which the force does work on the block is equal to 826.17 Watt
