Answer:
D
Explanation:
The wrecking ball transfers kinetic energy to the wall.
The weight is the force experienced, whereas the mass represents the actual quantity of matter inside a body..
weigh on the surface of the earth is equal to mg
mass is m
and at the centre weight is 0 due to 0 acceleration that's 0 g
but mass is always constant and remains m, no matter where you are
Answer:
The work done on the jet by the catapult is 1.53 x 10⁷ J
Explanation:
Given;
force of thrust engines, F = 2.3 x 10⁵ N
distance moved by the thrust engines, d = 90 m
kinetic energy of the plane, K.E = 3.60 x 10⁷ J
Based on work-energy theorem;
the net work done on the plane by catapult and the thrust engine is given as;
work done by the thrust engine on the jet;
Work done on the jet by the catapult;
Therefore, the work done on the jet by the catapult is 1.53 x 10⁷ J
Answer:
The key point was that Kennedy challenged Nixon to a series of televised debates. It was the first televised presidential debate in American history.
In 1960, 88 % of American homes had television. About 2/3 of the electorate watched the first debate on TV. Nixon was recovering from a knee injury, he looked drained. Kennedy, meanwhile, had been resting in a hotel for an entire weekend, he looked tan and confident.
Most Americans watching the debates voted for Kennedy, most radio listeners seemed to give the edge to Nixon. hope this helps