Answer:
The same book on a table has more potential energy.
Explanation:
The potential energy of a body on Earth is defined as the energy possessed by the virtue of its heights.
The equation for gravitation potential energy is given by
P.E = mgh joules
From the above equation it is evident that when there is a change in the value of 'h', there is a change in the value of P.E
So, as per the above equation, the potential energy of book on floor
P.E = m x g x 0 ∵ h = 0 at floor
P.E = 0
The same book on the table has some magnitude in 'h' greater than zero
So, the same book on a table has more potential energy.
Answer:
1 weight, 2) normal and 3) friction
Explanation:
In a circular path on the block various forces are exerted, at the lowest point of the path we have the following forces
1) The weight that is the attraction of the Earth on the body, is directed vertically, downwards
2) The normal that is the reaction of the Earth to the support of the body, is directed vertically upwards
3) if the track has a friction force in the opposite direction of the turn, directed horizontally and in the opposite direction of the direction of movement.
Answer: C. 39 s
Explanation:
We know the constant speed is 0.22 m/s. We have to get to 8.5 m. We divide <u>8.5 m by 0.22</u> = 38.6. After we estimate, 6 is greater than 5, so 39 s.
The answer here would be the first law of motion. An object in motion will stay in motion unless acted upon by another force.
