A train is moving with a uniform velocity of (2i-j+4k)m/s If the force required to overcome the friction is - Physics - Work Energy And Power

Question

A train is moving with a uniform velocity of (2i-j+4k)m/s If the
force required to overcome the friction is (i-3j+2k)N, what is the
power of the engine?

Sanat K Mukherjee · Accepted Answer

Dear student,
Power of the engine = F →v→ = (i-3j+2k)
(2i-j+4k) = 2+3+8 = 13W
Regards,

A train is moving with a uniform velocity of (2i-j+4k)m/s. If the force required to overcome the friction is (i-3j+2k)N, what is the power of the engine?