Question

1. The same force at different times on two masses m1 is given an acceleration of 4m/s2 and m2 is given an acceleration of 1m/s2. (a)What is the ratio of the masses , m2/m1 (b) suppose the two masses are combined an the same force is acted on the combination . what is its acceleration.

2. A 5g bullet is accelerated to 300m/s s down a 72cm gun barrel . Assuming a uniform acceleration. what is the net force on the bullet in the gun barrel?

3. The displacement of 20kg mass as a function of time in SI units is given by r(t) =(2t square - 9t-15,-16tsquare + 5t + 18) what is the net force acting on the mass as a function of time ? what is the net force at t=2 s?.... (please note the square is raise the power 2)

4.Two forces F1 and F2 act on a 12kg mass to produce an accceleration of magnitude of 3m/s square in the negative y direction . if the first force is given by F1 (-30,20) N then what is the value of the second force F1?

5.Two blocks with masses m1 and m2 are dragged along a frictionless surface a.they are pulled by a force F are connected by a string . What is the tension in the rope T?

Answer 1

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