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From the conservation of energy, we know that the change in gravitational potential energy (GPE) is equal to the change in kinetic energy (KE). GPE=mgh and KE=(1/2)mv^2. At the top of the slope, the car s...
As the bar magnet enters and exits the coil, there is a change in magnetic flux linkage through the coil. According to Faraday's law, an EMF is induced across the coil that is proportional to the rate of ...
Weight is the product of an object's mass and the dominant gravitational field that it feels. On Earth, objects feel a gravitational acceleration which is dependent on the mass of the earth and its rotati...
The Earth is on a tilted axis, a full rotation takes 24 hours and this is our day length. As well as spinning on its axis, the Earth also orbits the Sun. This orbit takes 365 days to complete, but it's th...
The man is 80kg so the downward force exerted by his weight is 80g (where g is the force of gravity equalling 9.8 Newtons (2dp)). Therefore the upward force exerted by each rope must equal 40g. Using tri...
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