Two objects (42.0 and 21.0 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find (a) the acceleration of the objects and (b) the tension in the string.

a = 3.27 m/s²

T = 275 N

Explanation:

Given that:

Mass m₁ = 42.p0 kg

Mass m₂ = 21.0 kg

Consider both masses to be in a whole system, then:

The acceleration can be determined as:

Making acceleration the subject in the above formula;

a = 3.27 m/s²

in the string, the tension is calculated using the formula:

T = 274.68 N

T ≅ 275 N

found in the nucleus

has mass of one amu