Assignment:
Question 1. The speed of a 4.0kg object is given by (2t) m/s, where t is in seconds. At what rate is the resultant force on this object doing work at t = 1 second?
a) 48 W
b) 40 W
c) 56 W
d) 16 W
Question 2. A 10kg object is initially at the top of a rise, at point A. It then moves down to point B. Choose point B to be your zero level for gravitational potential energy. Find the change in potential energy of the object if point B is 10m lower than point A?
a) -980
b) -10
c) -100
d) -98