2. a woman pulls a 20 kg suitcase along a 15 m corridor using a horizontal force of 50 n. 2.1 calculate the work done by the woman. give the correct unit. work done = = 2.2 work has to be done against frictional forces acting on the wheels of the suitcase. explain the effect this has on the temperature of the suitcase.

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

Apair of 10μf capacitors in a high-power laser are charged to 1.7 kv.a. what charge is stored in each capacitor? b. how much energy is stored in each capacitor?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion