4. Density is defined as the ratio of mass per r L where p is the Greek letter "rho", represent measured to be m = 50 g and its volume w What is the density, p, in terms of SI units? M= p=m sog V = 1000 cm³ l

a) I. What is the weight (in Newtons) of a 32 kg child? Show ALL work. II. What is the mass (in kg) of a student who weighs 582 N? Show ALL wOrk.

5. A force of 50 N is required to stretch a spring 10 cm beyond its natural length. How much work will be done stretching the spring 20 cm from its natural length?

1. How much work is required for a mechanical hoist to lift a 9000. N automobile to a height of 1.800 m for repairs?

8). How much work can a 50.0 kg wrecking ball traveling at 5.00 m/s do o the building it strikes? A). 250 J B). 625 J C). 1250 J D). 2500 J

3. A car moving at 60 km/h skids 20 m with locked brakes. How far will the car skid with locked brakes at 120 km/h?

If you double the force and double the distance, work is increased by   A. Three times (work triples)   B. Four times.   C. Two times( work doubles)   D. work increased by 2.5 times

1.3 A dog pulls a cart with a constant force of 50N. How much work is done by the dog to move the 200 m cart if the handle forms an angle of 20° with the ground?

Be systematic when answering. Write the given, label them; the required; and all calculations pertinent to the problem. Answers provided should correspond to the solution.

14) A student drops a rock from the top of a building. If the rock is traveling at 19.1 m/s when it strikes a window ledge that is 2.5 m above the ground, how tall is the building? Neglect air resistance. Show work. A) 21 m B) 43 m C) 36 m D) 47 m