Top answers

A 10 kilogram block slides down a 30 degree inclined slope, the slope has a coefficient of friction of 0.2. Calculcate the blocks acceleration down the slope.

Resolving all forces in the vertical gives the normal force as 10gcos(30). Resolving all forces normal to the slope gives the frictional force as 2gcos(30) (given Friction = mu*R). Using second law, F=ma. 10...
FR
Answered by Frederick R. • Maths tutor
3690 Views

3/5 of a number is 162. Work out what 4/5 of the same number is.

216
Answered by • Maths tutor
3761 Views

Expand the brackets? (x+4)(2x-3)

Create a smiling face with arrows between the terms and then go through and multiply the terms together.(Diagram of the smiling face)(x+4)(2x-3) = 2x 2 - 12 - 3x + 8x = 2x 2 + 5x - 12Then simply reorganise t...
TR
Answered by Tim R. • Maths tutor
5178 Views

Solve: 3x+5y=19 4x-2y=-18

These are simultaneous equations and we need to find the value of X and Y. We can use the elimination method. The coefficients (the amount the letter is being multiplied by) of X and Y do not match. First, w...
CL
Answered by Charlotte L. • Maths tutor
5932 Views

How do I maximise/minimise a given function f(x)?

To find an extreme point of a function you must first take the derivative of f(x) with respect to x. As the function will peak/trough at the extreme point, the gradient at this point will be equal to 0 and t...
Answered by • Maths tutor
4343 Views