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Gravity and motion — Question 249

Original QCE Vault practice · 5 marks

Q249 · Practice questionComplex familiar5 marks

QUESTION 249 (5 marks)

A

4.00\,\mathrm{kg}

block rests on a smooth

30.0^\circ

incline. It is attached by a massless string over a frictionless pulley to a hanging mass

m

. The system is in equilibrium. Use

g=9.80\,\mathrm{m\,s^{-2}}

.

Block on an incline joined by a string over a pulley to a hanging mass; incline is 30 degrees.

a)

Determine the hanging mass.

[3 marks]

b)

The hanging mass is replaced by

3.00\,\mathrm{kg}

. Determine the magnitude and direction of the acceleration.

[2 marks]

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