1. A 10 kg bix,initially at rest, is pulled through a distance of 8 m across a level floor by a 10 N force applied parallel to the floor.The coeffcient of friction between the floor and the box is 0.25
a. what is the work done by the force ?
b. what is the work done by friction?
c. what is the network on the box?
d. what is the speed of the box at the end of 5 m?
2.Two bodies of masses 2 kg and 4 kg moving with velocities of 10 m/s, east and 20 m/s west respectively,collide head on.
a. what is the total momentum of the bodies before collision ?
b. if the collision perfectly inelastic,what is the velocity of the bodies after collision?
c. if the collision is perfectly elastic,what is the velocity of the 2 kg and 4 kg ball after collision?
please kindly help me with dis problem
a BIG THANKS
2007-02-18
18:37:23
·
3 answers
·
asked by
ice_cream_chico
1
in
Physics