Search our library of Physics GCSE questions

Top answers

Physics

GCSE

Jane drops a football from the roof onto the ground below. The ball weighs 0.8kg and the distance the ball falls is 5m. Assuming there are no external forces acting on the ball, what speed will the ball be travelling at just before it hits the ground?

As the ball falls from a height to the floor, the gravitational potential energy stored in the ball will be converted to kinetic energy.The gravitational potential energy of the ball can be calculated usi...

Answered by Katie O. • Physics tutor

1065 Views

What is the resistance (in Ohms) of two 20 Ohm resisters in parallel?

1/20 + 1/20 = 1/R2/20 = 1/R1/10 = 1/RR = 10
Now, answer for a 20 Ohm and a 10 Ohm resister in parallel?1/20 + 1/10 = 1/R3/20 = 1/RR = 6.67 Ohm

Answered by Tutor612997 D. • Physics tutor

1112 Views

A bowling ball is thrown into the alley, having velocity of 3 ms^-1 at the start of the bowling alley. It decelerates at a constant rate, before hitting the skittles at 2 ms^-1 after 4 s A) calculate the acceleration of the ball.

A) acceleration (m/s2) = change in velocity (m/s) / time (s)
A) -1.0 ms^-1 / 4 s = -0.25 ms^-2
B) Calculate the displacement the ball travelled before hitting the skittles...

Answered by Alexander N. • Physics tutor

1680 Views

I never know where to start where I get a calculation question given many values, what should I do? (e.g: finding how much energy is needed for all the ice in a glass of water to melt after the ice is dropped into warm water)

Firstly, you should always list down the values that were given to you in the question so that you know exactly what you already know, and then by looking at this list, it makes it easier for you to remem...

Answered by Simone L. • Physics tutor

1015 Views

Alice and Bob are sat on a seesaw. The seesaw is in static equilibrium. Alice weighs 500N and is sat 0.5m to the left of the pivot. If Bob weighs 800N, how far from the pivot on the right is he sat? What happens if Bob moves closer to the pivot?

First of all draw a diagramIf the seesaw is in static equilibrium this means:There is no net force on the seesawThere is no net moment on the seesawAs a result the anti clockwise moments about the pivot e...

Answered by Lucas S. • Physics tutor

2131 Views