An object is hanging by a [mass-less] string on a [mass-less] pulley from a cart on a desk with a mass of 1.8 kg. The cart has an acceleration of 2.5 m/s^2. Calculate the mass of the hanging object given that:
a) There is no friction.
b) There is a frictional force of 0.4 N on the wheels of the cart.
Fnet = ma
The Attempt at a Solution
m1 = 1.8 kg
a = 2.5 m/s^2
m2 = ?
I don't know where to start with this question...
Maybe Fnet = (1.8 kg)(2.5 m/s^2) = 4.5 N ? But what would I do with this.
... I don't know.