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A 1000kg car accelerates from 0 to 20 m/s in 15 seconds. Calculate the acceleration of the car, the force required for this acceleration and the momentum of the car at 20 m/s.

The first part of the question, calculating the acceleration, uses the fact that acceleration equals the change in velocity divided by the time. In this case, the change in velocity is 20-0 and the time is 1...
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Answered by Richard M. • Physics tutor
5528 Views

Expand and simplify the following: (2x+3)(2x+5)

Expanding this expression means multiplying the contents of the first bracket by the contents of the second. An easy way to remember this is using the FOIL method. FOIL stands for First, Outside, Inside, Las...
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Answered by Richard M. • Maths tutor
7112 Views

A ten-sided die with sides numbered 1-10 is thrown. What is the probability of throwing a 1?

There are 10 sides, therefore there are 10 options each roll for what side could be shown. In probability, this means we put 10 as the denominator in the fraction. Now the condition is that a 1 is shown and ...
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Answered by Tutor83237 D. • Maths tutor
8938 Views

Find the value of 5x - 3y when x = -2 and y = -4

This question is all to do with substitution. First, rewrite the question but in instead of writing x and y, put brackets. It will look like this: 5( ) -3( ) Now inside the brackets where x and y would go wr...
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Answered by Tutor83237 D. • Maths tutor
14202 Views

How should I write an introduction for a GCSE English exam?

The best first step for a good introduction is detailed planning. However, in an exam situation there is not much time to spend a long time planning. Luckily, there are some basic guidelines to remember when...
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Answered by Daisy R. • English tutor
12279 Views