Answer: the wall contracts the force exerted by his head. The wall produces the opposite force which is equal to the force his head bangs the wall with.
Explanation: if his head exerts a much greater force than the wall can counteract the wall will be destroyed, if the wall exerts a much greater force than his head exerts he will be pushed far back and might even suffer a broken head.
The wall in this case provides the opposite reactive force.
Answer:
55 kg
Explanation:
Mass does not change and is not dependant on gravity. So even though your weight will be less on the moon your mass won't change.
It is either a person who studies Linguistics or
a person skilled in foreign languages
They are almost the same temperature!!
U = mgh, Ek = 1/2*m*v^2
U = Ek (conservation of mechanical energy)
⇒ mgh = 1/2*m*v^2
∵g = 10, v = 20
⇒ 10h = 1/2*400
⇒ h = 20 (m)
