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Physics
GCSE

Sam has a 250 g toy car that he launches with a rubber band up a track to do a jump. Sam builds a ramp for his jump that is 0.5 m high and the car is launched at a velocity of 3.0 m/s. With no friction, will the car jump off the end of the ramp?

The kinetic energy of the moving car will be converted to gravitational potential energy as it travels up the ramp. At the point that the car will jump, KE = GPE therefore 1/2 mv^2 = mgh. Therefore, when ...

Answered by Sam B. Physics tutor
1336 Views

Describe what red shift is and why i provides evidence for the Big Bang Theory.

Red-shift is the increase in wavelength emitted from distant objects moving away from the observer, making them appear more red.The Big Bang Theory states that the universe began from a singularity which ...

Answered by Robert D. Physics tutor
1861 Views

When the current through an ohmic conductor is 2A, the potential difference across it is 6V. What is the potential difference across the same ohmic conductor when the current is increased to 3A?

To answer this, you need to pick up on the clues in the question. "Ohmic conductor" is explicitly mentioned twice, so this is likely to be important. You should know that for ohmic conductors, p...

Answered by Eleanor Grace G. Physics tutor
2884 Views

Which of the following are magnetic materials? Copper, Cobalt, Carbon, Nickel

Cobalt and Nickel

Answered by Elizabeth M. Physics tutor
1575 Views

PHYSICS A LEVEL Explain why, when a red giant becomes a white dwarf, it moves towards the lower left of the Hertzsprung-Russell diagram [2]

The fusing red giant shell drifts away form the core forming planetary nebula. Leaving only very hot core (white dwarf) (1) The core is hotter than the shell , the star moves left on ...

Answered by Lavana C. Physics tutor
1403 Views

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