Question

questions

Answer 1

Suppose a 1,600 kg car is traveling at 20.0 m/s. What average force is needed to stop the car in 4.0 s?
(Points : 3)
5.0 N

8.0 × 103 N

64,000 N

130,000 N


12. A baseball of mass 0.145 kg approaches a bat at 40.0 m/s. After it is hit, the ball leaves the bat at 50.0 m/s directly back. Find the impulse of the bat on the ball.
(Points : 3)
13.1 kgm/s

7.25 kgm/s

5.80 kgm/s

1.45 kgm/s


13. Which of these leads to the conclusion that linear momentum is conserved?
(Points : 3)
the relation between the mass of an object and its weight

the fact that the force each of two objects exerts on the other is equal in magnitude and opposite in direction

the equivalence principle

the bending of space-time