I have a few questions about physics please help. Thanks! 1) You are walking at

Question

I have a few questions about physics please help. Thanks!

1) You are walking at 1.63 m/s.  If your weight is 583 N, what is the magnitude of your momentum?

2)  A 1.0-kg ball has a velocity of 12 m/s downward just before it strikes the ground and bounces up with a velocity of 12 m/s upward.  What is the change in momentum of the ball?

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

4) A 0.1-kg steel ball is dropped straight down onto a hard, horizontal floor and bounces straight up.   The ball

Explanation / Answer

1. mg = 583/9.8 * 1.63

= 96.97 kg.m/s

2. change in momentum = 12 - (-12)

= 24 kg.m/s

3. K = P^/2m

1000 = 200^2/2m

m = 20 kg

4. impulse = 0.1 *(10 - (-10))

= 2 kg.m/s

5. impulse = force*time

0.065*( 15 +15 ) = F*0.020

F = 97.5 N

6. figure is not visible.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

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