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This Question is a multi-parter but all around the same scenario. Similar to an end of paper A-level physics question.

Alex and Billy are launching the air rockets they made by launching them using a bike pump. They each have a rocket, a launchpad, a bikepump connected to it and their teacher Daniel has two stopwatches. They...
Answered by • Physics tutor
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A diver of mass 60kg stands on the end of a diving board of length 2m from the pivot point. Calculate the upward force exerted on the retaining spring 30cm from the pivot point.

This question is asking about forces acting around a pivot point, so we can use the formula for the moment M = F*D about the pivot point. The clockwise and anticlockwise moments around the pivot must be equa...
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Answered by Louis G. • Physics tutor
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Why is gravitational potential energy negative?

While on the Earth's surface, you need to put in energy to move upwards, due to the force of gravity from the Earth's mass acting on you - eg jumping upwards requires energy. The force of gravity is stronges...
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What is terminal velocity?

Terminal velocity is the final velocity an object achieves during freefall through a medium under the influence of gravity and upthrust from the medium. For example, dropping a tennis ball from a plane. The ...
CJ
Answered by Chenyang J. • Physics tutor
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Describe energy transformations in a oscillating pendulum, which undergoes simple harmonic motion. How this implies the velocity at critical (lowest and highest) points?

Our object will have a combination of potential energy (due to it's position relative to the ground) and kinetic energy (due to it's velocity).Consider the potential energy first. It depends on the height of...
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Answered by Ksenija K. • Physics tutor
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