Newton's Second Law (AQA A-Level Mathematics): Quizzes

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Connected Bodies - The Lift Problem
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Which law is primarily used to analyse the lift problem?

Newton's second law of motion

What are the two forces acting on the lift itself?

Weight MgMg down, tension TT up

What is the normal force NN on a person inside the lift called?

Apparent weight

What is the formula for tension TT in the lift cable?

T=M(g+a)T = M(g + a)

What is the formula for apparent weight NN of a person in the lift?

N=m(g+a)N = m(g + a)

What is the apparent weight when the lift moves at constant speed?

N=mgN = mg (equals actual weight)

How does a person feel when the lift accelerates upwards?

Heavier

How does a person feel when the lift accelerates downwards?

Lighter

When does a person experience weightlessness in a lift?

When a=ga = g (free fall)

A 500 kg lift accelerates up at 2 m/s². What is the cable tension? (use g=9.8g = 9.8 m/s²)

5900 N

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