Answer:
The average velocity of an object is its total displacement divided by the total time taken. In other words, it is the rate at which an object changes its position from one place to another.
Explanation:
Average velocity is a vector quantity. The SI unit is meters per second. However, any distance unit per any time unit can be used when necessary, such as miles per hour (mph) or kilometer per hour (kmph)
Answer:
Efficiency can be increase by using rollers in conjunction with the inclined plane. Wedge. The wedge is an adaptation of the inclined plane. It can be used to raise a heavy load over a short distance or to split a log
The sun is the only object in the solar system that produces and radiates visible light.
Answer:6.82 m/s
Explanation:
Given
Height of hill 
Suppose r is the radius of hoop and m be its mass
So moment of inertia is given by
Using conservation of energy we get
Potential energy at top=Kinetic+Rotational energy at bottom
where 
v=velocity of hoop
(without slipping)
