Question

13) Determine the buoyant force, in N, of water on a completely submerged object having a volume of 3.40 m³.

a) 4.53 x 10⁴

b) 3.33 x 10⁴

c) 8.39 x 10⁴

d) 1.45 x 10⁴

Answer_______________

14) A 10,000-kg railroad car traveling at a speed of 2.0 m/s strikes an identical car at rest. The cars lock together as a result of the collision. Determine the velocity, in m/s, of the locked cars after the collision.

a) 1

b) 22

c) 17

d) 9

Answer_______________

15) A golf ball of mass 0.045 kg is hit off a tee at a speed of 45 m/s. The golf club was in contact with the ball for 3 ms (3 x 10^-3 s). Determine, in N, the average force exerted on the golf ball by the golf club.

a) 367

b) 675

c) 294

d) 579

Answer_______________

16) Two railroad cars, each of mass 6650 kg and traveling 30 m/s toward each other, collide head-on and come to rest. Determine, in J, the amount of thermal energy produced in this collision.

a) 6 x 10⁶

b) 2 x 10⁶

c) 1 x 10⁶

d) 8 x 10⁶

Answer_______________

Answer 1