Question
1)Two balls having the same mass of 1 kg roll toward each other, each moving at the same speed of 1 m/s. What is the combinded momentum?
Would it be 0 kg m/s
2)A 30 kg girl and a 25kg boy face each other on friction free roller blades. The girl pushes the boy who moves away at 1 m/s. The girls speed is?
Would it be .45
3)The power extended when a 10 N barbell is raised 2.0 m in 2 s is _____ watts
would it be 40?
4)Car A travels for times as fast as Car B. When braking to a stop Car A skids____ times as far as car B.
16?
(1) yes
(2) no. 30*Vgirl = -25*Vboy
Solve for Vgirl when Vboy = 1
(3) no. DIVIDE the work by the time
(4) yes. 4^2 = 16 Do you know why the skid is proportional to the square of speed? It has to do with kinetic energy
Would it be 0 kg m/s
2)A 30 kg girl and a 25kg boy face each other on friction free roller blades. The girl pushes the boy who moves away at 1 m/s. The girls speed is?
Would it be .45
3)The power extended when a 10 N barbell is raised 2.0 m in 2 s is _____ watts
would it be 40?
4)Car A travels for times as fast as Car B. When braking to a stop Car A skids____ times as far as car B.
16?
(1) yes
(2) no. 30*Vgirl = -25*Vboy
Solve for Vgirl when Vboy = 1
(3) no. DIVIDE the work by the time
(4) yes. 4^2 = 16 Do you know why the skid is proportional to the square of speed? It has to do with kinetic energy
Answers
would it be 55
Related Questions
Two balls have the same mass. One ball moving along the positive x-axis and the other ball moving al...
Two balls are released from the same height on the moon. They both reach the ground at the same time...
1. A jar contains five blue balls and five red balls. You roll a fair die once. Next you randomly dr...
Two balls roll down a ramp from the same height and hits a cup but one ball has a higher mass. What...