A custodian pulls a vacuum 13.5 m with a 33.9 N force at a 55.0°
angle, against a 14.1 N friction
force. Find the work done by the
custodian
(Unit = J)

What type of nuclear decay causes the atomic number of an element to increase by 1?

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?