Answer:
0.00321 Nm
Explanation:
= Final angular velocity = 3.5 rad/s
= Initial angular velocity = 0
= Angular acceleration
= Angle of rotation = 2 rev
Equation of rotational motion
Moment of inertia is given by
Torque is given by
The torque required is 0.00321 Nm
Answer:
The velocity of the boy and the skateboard is 24
Power is joules per second or J/s when work is measured in joules and time in seconds. The basic unit of power, 1 J/s is called a watt (W), named after James Watt who made important improvements to the steam engine. By definition, a watt is the consumption of one joule of energy per second.
Energy is measured in units called joules.
answer: a. joules.