Author Question: A 75-kg swimmer dives horizontally off a 500-kg raft. The diver's speed immediately after leaving ... (Read 89 times)

j.rubin · **on:** Jul 28, 2018

A 75-kg swimmer dives horizontally off a 500-kg raft. The diver's speed immediately after leaving the raft is 1.6 m/s. A microsensor system attached to the edge of the raft measures the time interval during which the diver applies an impulse to the raft just prior to leaving the raft surface. If the time interval is read as 0.20 s, what is the magnitude of the average horizontal force by diver on the raft?
a. 900 N
c. 600 N
b. 450 N
d. 1500 N

Question 2

Two point charges are placed along a horizontal axis with the following values and positions: +3.0 C at x = 0 cm and -6.0 C at x = 20 cm. At what point along the x axis is the electric field zero?
a. 8.0 cm
c. -38 cm
b. -48 cm
d. -69 cm