JOCKO, WHO HAS A MASS OF 60 kg AND STANDS AT REST ON ICE, CATCHES
A 20 kg BALL THAT IS THROWN TO HIM
AT 10 km/h. HOW FAST DOES JOCKO AND
THE BALL MOVE ACROSS THE ICE?

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.