1) a car moving at 50km/h crashes Into the barrier and stops in 0.25 m a) if a 10kg child were to be stopped in the same time , what is the average force must be exerted ? c)approximately what is the mass of an object whose weight equals to the force in Part b?Could you lift such a mass with your arms ? d) what does your answer to part c say about holding an infant on your lap instead of using a separate infant restraint? PS : I know answer abc but am stuck with d! A) t: 0.036s b) delta P : 139kg.m/s2 F: -3858N c) m : 393.7 no we can't ! D) ????? 2 ) If you jump off a table as your feet hit the floor let your legs bend at the knees explain why.5) a) 35g bullet Strikes at 5 kg stationary wooden block and embeds itself in the block the block and the Bullet fly out together at 8.6 m/s what was the original velocity of the bullet? 6) a 0.50kg ball traveling at 6m/s collides head on with a 1kg ball moving in the opposite direction at a velocity of -12m/s . The 0.50 ball Moves away at -14.0 m/s up aftet the collosion find the velocity of the second ball. Please THERE IS A LOT OF QUETIONS BUT THESE ARE THE ONES I DON'T GET!HELP

Question

1) a car moving at 50km/h crashes Into the barrier and stops in 0.25 m a) if a  10kg child were to be stopped in the same time , what is the average  force must be exerted ?  c)approximately what is the mass of an object whose weight equals to the force in Part b?Could you lift such a mass with your arms ? d) what does your answer to part c say about holding an infant on your lap instead of using a separate infant restraint? PS : I know answer abc but am stuck with d! A) t: 0.036s b) delta P : 139kg.m/s2 F: -3858N c) m : 393.7 no we can't ! D) ????? 2 ) If you jump off a table as your feet hit the floor let your legs bend at the knees explain why.5) a) 35g bullet  Strikes at 5 kg stationary wooden block and embeds itself in the block the block and the Bullet fly out together at 8.6 m/s what was the  original velocity of the bullet? 6) a 0.50kg ball traveling at 6m/s collides head on with a 1kg ball moving in the opposite direction at a velocity of -12m/s . The 0.50 ball Moves away at -14.0 m/s up aftet the collosion find the velocity of the second ball.    Please THERE IS A LOT OF QUETIONS BUT THESE ARE THE ONES I DON'T GET!HELP

drwls · Answer

Try posting your questions one at a time. Question 1 has no part b.