Question

A meter stick whose mass is 310 grams lies on ice. You pull at one end of the meter stick, at right angles to the stick, with a force F = 9 newtons. The ensuing motion of the meter stick is quite complicated, but what are the initial magnitude and direction of the rate of change of the momentum of the stick, dPtot/dt, when you first apply the force?

Answer 1

Answer:

$\frac{dp}{dt} = 9N$ and the direction of change of momentum will be in the direction of the applied force.

Explanation:

Given data in the question:

mass of the meter stick, ma = 310 grams

Applied force on the stick, F = 9 Newtons

Now, from the Newton's second law of motion we have

Net force = change in momentum per unit change in time

or

$F=\frac{dp}{dt}$

or

$\frac{dp}{dt} = 9N$

and the direction of change of momentum will be in the direction of the applied force.