Answer:
work done = ( force × displacement)
(a)The force acting on the block is it's self weight and displacement is equal to height of the tower.
work done by gravity = (250 × 10) = 2500 joule
(b) The work done by gravity 2500 joule is transferred to the object in the form of it's kinetic energy.
The correct option is (D). i.e.<span>When the current is too high, a metal strip in the fuse melts and opens the circuit.
Explanation: </span>The fuse contains a small piece of wire which has very less melting point. As there is huge current flow, the wire heats to the heavy current flow & melts & the circuit is broken.
Hence, it saves the device from the heavy current flow & the device is damage free. breaks the circuit if a fault in an appliance causes too much current flow.
Answer:
a force that is able to act at a distance
Explanation:
:)
When a 10-kg block is simultaneously pushed toward the east with 20N and toward the west with 15N, the combination of these forces on the block is 5N toward the East
Let's understand this problem in detail
Let
which is in east direction
and
which is acting in the west direction
Now, ![F_{net} = F_{1} + F_{2}](https://tex.z-dn.net/?f=F_%7Bnet%7D%20%3D%20F_%7B1%7D%20%2B%20F_%7B2%7D)
But
and
are in opposite direction.
So let's rotate the force vector
by 180 degrees which becomes ![-F_{2}](https://tex.z-dn.net/?f=-F_%7B2%7D)
Now both
and
are in same directionof the forces are in a single line
Adding both of them, we get
= ![F_{1} + (-F_{2})](https://tex.z-dn.net/?f=F_%7B1%7D%20%2B%20%28-F_%7B2%7D%29)
= 20N - 15N = 5N, as both of the forces are in east direction hence, the net force is also acting in the east driection
Learn more about forces here
brainly.com/question/13191643
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