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`“Life is like riding a bicycle.  To keep your balance you must keep moving.”–Albert Einstein`

## Monday, June 15, 2009

### AP Physics B&C – Free Response Practice Question on Newton’s Laws

The following question will be useful for AP Physics B as well as AP Physics C aspiramts. Parts (a), (b), (c) and (d) of the question are meant for B as well as C. Part (d) of the question is meant additionally for AP physics C aspirants. Here is the question: In the adjoining figure P1 and P2 are light frictionless pulleys. P1 is fixed and P2 is movable. The strings used are inextensible and of negligible mass. The fixed pulley P1 carries a mass M1 and the movable pulley P2 carries a mass M2 which has one and a half times the mass of M1. Now, answer the following questions:

(a) How is the tension T1 in the string attached to the mass M1 related to the tension T2 in the string attached to the mass M2?

(b) How is the magnitude of acceleration a1 of the mass M1 related to the magnitude of acceleration a2 of the mass M2?

(c) From the following options regarding the motion of the mass M1, select the correct one by putting a tick (√) mark:

Mass M1 will be accelerated upwards ______

Mass M1 will be accelerated downwards ______

Mass M1 will move with uniform velocity ______