Answer:
Zero work
Explanation:
Recall that work done on an object is defined as the product of the net force applied to an object times the distance it travels in the same direction as the force.
Since in this case Jim used a given force to push a rock, but it didn't move, then he did zero work (because the distance moved is zero).
Answer:
∆p=(m2v)kg.m/s
Explanation:
∆p=mv where v=2v. hence ∆p=m2v
Pretty sure the answer is C. Screw: wheel and axle
D
The northern hemisphere is experiencing winter because it is tilted away from the sun whereas the south experiences summer because it is tilted towards the sun
Answer:
Forces always occur in pairs. If a force is exerted on an object there will always be another force, equal in size, acting in the opposite direction .
