Donte is ice skating due north on a frozen lake at a speed of 3 m/s when he collides with Rebecca who was skating due east at 4 m/s.  Donte's mass is 95 kg, and Rebecca’s mass is 80 kg. a)  At what speed and in what direction do they move after they collide if they stick together and move as one? b)  Was there any loss in energy when they collided?  If so, how much?

1. In beta decay, an atomic nucleus emits an electron as it turns into another type of nucleus. A 2¹⁰Bi nucleus at rest decays to 210Po. Suppose the emitted electron moves to the right with momentum 5.60 x 10-22 kg m/s. The 210Po nucleus, with mass 3.50 x 10-25 kg, recoils to the left at a speed of 1.14 x 10³ m/s. Momentum conservation requires that a second particle, called an antineutrino, must also be emitted. Calculate the magnitude and direction of the antineutrino's momentum. 210PO 210Bi Before After e ?

You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless ice. Your own mass is 64.8 kg, and the sleds mass is 21.5 kg. You start at rest, and then you jump off the sled, after which the empty sled is traveling at a speed of 4.25 m/s. What will be your speed on the ice after jumping off?     0.71 m/s     2.12 m/s     1.77 m/s     1.41 m/s

Two trucks are approaching an extremely icy four way perpendicular intersection. Dennis is driving his 3100 kg truck northward at 22 m/s while Eddie drives eastward in his 1100 kg car. They collide and stick together, traveling at 59◦ north of east. What was Eddie’s original speed?

60 kg), Scotty (ms Chekhov (mc 75 kg), and Uhura (mu = 55 kg) are floating motionless in space near the Enterprise after it has been attacked by Tholians. All three are tethered with massless ropes for safety, with L₁ = 4 m, and L₂ 2 m. They pull on their ropes to change position. At some later time, they are all again motionless, but their positions have changed as seen here. How far did Uhura move horizontally? = BEFORE = L₁ 1₂ Answer: 3.79 m L₁ + 1₂ AFTER = L₁

Problem 1: a) What is the momentum of a garbage truck that has a mass of 1.1 × 104 kg. and a speed of 10 m/s? b) At what speed would a trash can of mass 8 kg have the same momentum as the garbage truck?

A body with mass of 5 kg is moving at a speed of 2 m/s and collides inelastically with another body with mass of 3 kg that stayed at rest before the collision. What speed will the bodies have after the collision?

It is generally a good idea to gain an understanding of the size of units. Consider each object and calculate the magnitude of their momentum in SI units. A ladybug with mass 28.50 milligrams flies by your head at 3.75 km/h. magnitude of the momentum: kg-m/s A 37.90 km boy walks at 4.05 km/h. magnitude of the momentum: kg-m/s A car with mass 841 kg is moving at a speed of 41.3 km/h. magnitude of the momentum: kg-m/s

A 17.8 kg sled is sitting at rest on level ice, and this sled is hit by another sled that is twice as massive. After the collision, the sleds stick together and move off at 6.3 m/s. How fast was the larger sled initially moving just before the collision?

A mass of m1= 4 kg moving with a velocity of v1=(2 m/s)ˆi (positive x−direction) collides with another mass, m2 moving at v2= (−4 m/s)ˆi (negative x−direction). The masses collide and stick together, moving off with a velocity of v= (−2 m/s)ˆi. What is m2? A)m2= 4 kg B)m2= 8 kg C)m2= 12 kg D)m2= 16 kg