What is true of the tension in one light string?

• It is the same along the string
• It is bigger near the heavier mass
• It is always zero

What is the first step with two bodies joined by a rope?

• Write one equation mixing both masses at once
• Draw one free body diagram per body
• Guess the tension and check it later

Why do connected bodies share the same size of acceleration?

• Because the string stretches to suit each mass
• Because pulleys add extra force
• Because both move as one unit along the string

For that same pulley pair, what is the rope tension in N?

Masses of 3 kg and 1 kg hang over a light pulley. Take g as 9.8. What is their acceleration in metres per second squared?

A person stands on a scale in a lift that starts moving up. What does the scale do?

• Reads more than when standing still
• Reads the same as when standing still
• Reads less than when standing still

Tom writes a single F is m a equation mixing both masses and one tension, then solves once. Is Tom right?

• Yes, one equation is always enough
• No, tension pulls differently on each body
• No, write F is m a per body, then solve

A 60 kg person stands on a scale in a lift accelerating up at 2 metres per second squared. Take g as 9.8. What does the scale read in N?