A body explodes and splits into three pieces, the first piece has mass of 1.25kg and velocity of [ 30 -10 ]m/s, the second piece has main of 3.25kg and velocity of [ -17 10 ]m/s the third piece has velocity of [ 35.5 40 ]m/s. What is the mass of the third piece. What was the total mass of the body before the explosion.

What happens to the light rays when they hit the specimen?

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.