Thursday, June 2, 2011

Can someone help me complete these momentum problems?

A hockey puck has a mass of 0.127 kg and is at rest. A hockey player makes a shot, exerting a constant force of 32.0 N on the puck for 0.16 s. With what speed does it head toward the goal?



A 94 kg fullback, running at 8.2 m/s, collides in midair with a 134 kg defensive tackle moving in the opposite direction. Both players end up with zero speed.

(b) What was the fullback's momentum before the collision?

(c) What was the change in the fullback's momentum?

(d) What was the change in the tackle's momentum?

(e) What was the tackle's original momentum?

(f) How fast was the tackle moving originally?



A 0.105 kg hockey puck, moving at 35.0 m/s, strikes a 0.240 kg octopus thrown onto the ice by a hockey fan. The puck and octopus slide off together. Find their velocity.



A football punter accelerates a 0.40 kg football from rest to a speed of 19.0 m/s in 0.10 s. What constant force does the punter exert on the ball?Can someone help me complete these momentum problems?
1) 32(.16)=.127v_2 ==%26gt; v_2=40.3

2)i'm too lazy

3).105(350=.345*v_2 ==%26gt; v_2=10.6

4)0+F(.10)=.40(19) =%26gt;%26gt;F=76N

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