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An object has a mass of 10kg and sits on a slope with an angle of elevation of 45 degrees. work out the reaction force of the object to the slope and the force acting down the slope. (3/4 marks)

step 1: find objects weight by doing 9.81x10= 98kg (2s.f.)step 2: draw a triangle of forces about the object including all information you know e.g. 45 degree angle step 3: force down the slope use the equat...
MJ
Answered by Mikey J. • Physics tutor
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Two forces of 4N and 10N act on a body. Which of the following could not be the resultant magnitude? (14N, 7N, 6N, 3N)

My first thought when dealing with resultant forces is to try out the most common combinations: combined and opposite. In this case 10N + 4N = 14N and 10N - 4N = 6N. This tactic does rule out two of the answ...
AJ
Answered by Aleksandr J. • Physics tutor
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How can we explain the standing waves on a string?

When a wave reaches the end of a string, it is reflected and inverted, so in a fixed string in which we've caused vibrations, such as a guitar string, we have two sinusoidal waves travelling in opposite dire...
BA
Answered by Boris A. • Physics tutor
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Why do we say that objects moving in a circle have acceleration even if their speed remains constant?

Because their speed might remain constant, but their velocity doesn't. Remember, velocity is a vector, so it has magnitude (which is the speed of the object), but also direction. For an object moving in a ci...
BA
Answered by Boris A. • Physics tutor
3390 Views

How do I find the x and y components of a vector?

If you've been given the angle the vector makes with an axis, you can find the component of the vector parallel to that axis by multiplying the size of the vector by the cosine of the angle it makes with the...
EE
Answered by Emma E. • Physics tutor
2412 Views