Answer:
10389.6 J
Explanation:
Power is the rate of doing work with respect to time, its S.I unit is in watts but it can also be expressed in J/s. Power is calculated using the formula:
Power is also the rate at which energy is used per second.
Energy is the capacity to do work and it is measured in joules (J).
Power = current × voltage = 7.4 A × 3 V = 22.2 W
Answer:
Part a)
Part b)
Direction is 45 degree North of West
Part c)
Part d)
direction of velocity will be 45 Degree North of West
Part e)
Part f)
North of East
Explanation:
Initial position of the cyclist is given as
due East
final position of the cyclist after t = 21.0 s
due North
Part a)
for displacement we can find the change in the position of the cyclist
so we have
so magnitude of the displacement is given as
Part b)
direction of the displacement is given as
so it is 45 degree North of West
Part c)
For average velocity we know that it is defined as the ratio of displacement and time
so here the magnitude of average velocity is defined as
Part d)
As we know that average velocity direction is always same as that of average displacement direction
so here direction of displacement will be 45 Degree North of West
Part e)
Here we also know that initial velocity of the cyclist is 13 m/s due South while after t = 21 s its velocity is 13 m/s due East
So we have
change in velocity of the cyclist is given as
now average acceleration is given as
so the magnitude of acceleration is given as
Part f)
direction of acceleration is given as
North of East