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A force is applied to a box of mass 2kg so that is accelerates at 2ms^-2. Find the force acting on the box and thus calculate the work done in moving the box 10m in the direction of the force.

Force=(mass)x(acceleration) F=2x2=4N Work done=(Force)x(distance) W=4x10=40J
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What is the equation of an accelerated body moving in one dimension?

x=x 0 +v 0 t+1/2at 2
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Answered by Pablo A. • Physics tutor
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When a force is applied to a spring, the spring extends by 12cm. The spring has a spring constant of 25 N/m. Calculate the force applied to the string in N.

The equation needed in this scenario is: Force Applied (F) = Spring Constant (k) x Extension (x). This will most likely be given to the student on the data sheet for most exam boards. Firstly, you must conve...
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Answered by Matthew G. • Physics tutor
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A bat emits a sound wave with a frequency of 25.0 kHz and a wavelength of 0.0136 metres. Calculate the speed of this sound wave.

In this question you are given frequency and wavelength of the wave and you are asked for the speed. You need to use the formula on you sheet that uses these three properties : v = f x λ, where v is the spee...
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Answered by Libby D. • Physics tutor
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how do i calculate acceleration?

it is the change in speed over time. So a = v-u / t
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Answered by Abdullah T. • Physics tutor
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