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A Level

Explain the difference between forced vibration and resonance in an oscillating object.

Forced vibration:

The object oscillating will vibrate upwards and downwards with the same frequency the driving oscillation is at. The amplitude of the v...

Answered by Matthew P. • Physics tutor

27119 Views

How can an object be accelerating if it does not change in speed?

Speed is a scalar quantity, meaning that it only has a magnitude. Acceleration is a vector quantity, meaning that it has a magnitude and a direction. Velocity is the vector quantity equivalent of speed...

Answered by Chantelle C. • Physics tutor

8536 Views

Describe and explain the first stages of the life cycle of a star before it reaches the main sequence.

The star begins as a stellar nebulae. This is a dense cloud of gas and dust containing hydrogen and helium. As it is under a large amount of gravitational pressure, this nebula will then collapse under...

Answered by Laura B. • Physics tutor

6898 Views

The vehicle accelerates horizontally from rest to 27.8 m s–1 in a time of 4.6 s. The mass of the vehicle is 360 kg and the rider has a mass of 82 kg. 1. Calculate the average acceleration during the 4.6 s time interval.

This question is testing your ability to recognise which equations to use from the formula sheet based on the variables provided.

To start, write down the known variables in the SUVAT fr...

Answered by Zaid A. • Physics tutor

6706 Views

A 0.20 kg mass is whirled round in a vertical circle on the end of a light string of length 0.90 m. At the top point of the circle the speed of the mass is 8.2 m/s. What is the tension in the string at this point?

A diagram would be very beneficial for this problem. We can draw a free body force diagram of the mass. At the top of the circle the two forces acting on it are its weight and tension from the string. Bot...

Answered by Thomas C. • Physics tutor

47905 Views