1) A 1.5 kg playground ball is moving with a velocity of 3.0m/s directed 30 degr

Question

1) A 1.5 kg playground ball is moving with a velocity of 3.0m/s directed 30 degrees below the horizontal just before it strikesa horizontal surface. The ball leaves this surface 0.5 slater with a velocity of 2.0 m/s directed 60 degrees above thehorizontal. What is the magnitude of the average resultantforce on the ball?

2) a 2.0 kg object moving 5.0 m/s collides with andsticks to an 8.0 kg object initially at rest. Determine thekinetic energy lost by the system as a result of thiscollision.

3) A 1.6 kg block is attached to the end of a 2.0mstring to form a pendulum. The pendulum is released from restwhen the string is horizontal. At the lowest point of itsswing when it is moving horizontally, the block is hit by a 10 gbullet moving horizontally in the opposite direction. Thebullet remains in the block and causes the block to come to rest atthe low point of its swing. What was the magnitude of thebullet's velocity just before hitting the block?

2) a 2.0 kg object moving 5.0 m/s collides with andsticks to an 8.0 kg object initially at rest. Determine thekinetic energy lost by the system as a result of thiscollision.

3) A 1.6 kg block is attached to the end of a 2.0mstring to form a pendulum. The pendulum is released from restwhen the string is horizontal. At the lowest point of itsswing when it is moving horizontally, the block is hit by a 10 gbullet moving horizontally in the opposite direction. Thebullet remains in the block and causes the block to come to rest atthe low point of its swing. What was the magnitude of thebullet's velocity just before hitting the block?

Explanation / Answer

v = vcos i -vsin j
v' = v'cos' i + v'sin'j
F * t = m(v' - v) = m*[(v'cos'i + v'sin' j) - (vcosi - vsin j)] = (-2.397i + 4.848 j) Ns
F = (-4.794 i + 9.696j) N
the magnitude = (4.7942 + 9.6962) =10.8 N

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.