A mass (10 kg) is at rest on a surface (Ustatic=0.6 Mkinetic=0.3)
connected by a cord to a
hanging mass of 3 kg. The
connecting cord is
mass-less and stretch-free.
The pulley is mass-less
and frictionless. What is
the force of friction on
the heavier mass? (Work needed)

The step-down transformer gives a current of 10a at 24v if the primary voltage is 240v calculate the 1_primary current 2_the power input 3_the power output

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Aperson standing in a canoe exerts a force of 700 n to throw an anchor over the side. find the acceleration of the canoe if the total mass of the canoe and the person is 100 kg?