Search our library of Physics A Level questions

Top answers

Physics

A Level

A block of ice slides down the full height from one side of a 1m high bowl and up the other side. Assuming frictionless motion and taking g as 9.81ms-2, find the speed of the block at the bottom of the bowl and the height it reaches on the the other side.

Using the law of conservation of energy, the potential energy of the block is transferred to kinetic energy as it slides down. KE [0.5mv²] = PE [mgh], v = √2gh v = √29.811 = 4.43 ms

Answered by Oluwatosin S. • Physics tutor

1838 Views

What is electromotive force (emf) and how can the emf of a battery be measured?

The electromotive force is the work done by a battery on the charge carriers to transport them across the entire circuit, per unit charge. It can be thought of as the specific energy given to the charge c...

Answered by Dan S. • Physics tutor

8290 Views

A projectile is launched from the ground at a speed of 40ms^-1 at an angle of 30 degrees to the horizontal, where does it land? What is the highest point the projectile reaches?

Since the SUVAT equations of motion act independently in the horizontal and vertical directions we can use the vertical equations to find the total time (the time when total vertical displacement is zero)...

Answered by Ben L. • Physics tutor

2804 Views

Can you explain the Work-Energy principle and how you can apply it in a simple situation such as a box sliding down a rough slope?

The Work-Energy principle states that the total work done on or by an object is equal to the total change in energy between the given initial and final states. This can be reworded to also say that the to...

Answered by Jagan A. • Physics tutor

12777 Views

How do you combine resistors is series and parallel?

In a series circuit each resistor will have the same current passing through it. If we assume that the wires connecting the resistors have no resistance, then the total potential difference, V, is given ...

Answered by Matt Q. • Physics tutor

3386 Views