1. In an elastic collision, an object with momentum 50 kgm/s collides with another that has a momentum 27 kgm/s in the opposite direction. The first object's momentum changes to 17 kgm/s. What is the momentum of the second object after the collision?

2. An emf is induced by rotating a 1,779 turn, 2.8 m diameter coil in Earth's 5.00 10-5 T magnetic field. What average emf is induced, given the plane of the coil is originally perpendicular to Earth's field and is rotated to be parallel to the field in 4.9 ms?

3. For how long should a force of 75 N be applied to an object of mass 42 kg to change its speed from 11 m/s to 40 m/s?

4. A runner at the start of a race generates 225 W of power as he accelerates to 9 m/s . If the runner has a mass of 53 kg, how long did it take him to reach that speed?

5. A straight wire segment carries 2.4 A. What length would it need to be to experience a 2-mN force from a magnet that produces a uniform magnetic field of 10 mT that is perpendicular to the wire? (answer in centimeters)

(Please I have an hour to turn these in)