1 answer:
A. A stretched catapult can do work when released so it must have potential energy. b. A stone on the ground will not move on its own ever again so it has zero energy. c. In order to roll an object there must be a friction force between the object and the ground (otherwise it will slide) d. To lift a stone you must overcome the weight which is the force due to gravity. e. Work and energy are both measured in Joules.
You might be interested in
At a definite point, the bridge would begin oscillating to the matching rhythm as that
of the marching footsteps.
This oscillation would touch a determined peak when the bridge can
no longer tolerate its own
power and later collapses. So, soldiers are
systematic to break their steps
while passing a bridge.
Answer:
(E)56.0 m/s
Explanation:
Height =h=-160 m
Because the wallet moving in downward direction
Time=t=7 s
Final speed of wallet=v=0
We have to find the speed of helicopter ascending at the moment when the passenger let go of the wallet.
Where
Substitute the values
Option (E) is true
It is B because the other ones are good.
Answer:opposite
Explanation:for a capacitor to discharge (after charging) the polarities of the current and voltage have to be reversed
BICYCLE
MOTOR BIKES
CARS
THEY ARE THE VEHICLES WHICH HAS GEARS IN THEM.