6. Mike is cutting the grass using a human-powered lawn mower. He p...

Question

6. Mike is cutting the grass using a human-powered lawn mower. He pushes the mower with a force of 47 N directed at an angle 42° below the horizontal direction. Calculate the work that Mike does on the mower each time he pushes it 9.3 m across the yard.

8. A projectile is launched with a momentum of 200 kg x m/s and 1000 J of kinetic energy. What is the mass of the projectile?

11. A bat strikes a 0.080-kg baseball so that its velocity changes by +34 m/s in 0.070 S. With what average force was the ball struck?

13. A 8.30-kg bowling ball strikes a 1.40-kg pin at rest head-on. Before the collision, the velocity of the ball is +9.00 m/s. After the collision, the velocity of the ball is +7.0 m/s. What is the velocity of the pin after the collision?

14. A force with a magnitude of 28 N and directed at an angle of 37° above the horizontal is used to move a 10-kg crate along a horizontal surface at constant velocity. How much work is done by this force in moving the crate a distance of 16 m?

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