1. [-l2 Points] DETAILS SERPSE10 9.1.0P.001. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A particle with kinetic energy equal to 276 J has a momentum of magnitude 26.4 kg - m/s. Calculate the speed (in m/s) and the mass (in kg) of the particle. Em Need Help? 2. [-11 Points] DETAILS SERPSE10 9.1.0P.002. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER At one particular moment, a 19.0 kg toboggan is moving over a horizontal surface of snow at 4.00 m/s. After 8.50 s have elapsed, the toboggan stops. Use a momentum approach to find the magnitude of the average friction force (in N) acting on the toboggan while it was moving. :iN Need Help? 3. [-l4 Points] DETAILS SERPSE10 9.1.P.002. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A 3.03 kg particle has a velocity of (2.93 I - 3.97 f) m/s. (a) Find its x and y components of momentum. (b) Find the magnitude and direction of its momentum. kg-m/s (clockwise from the +x axis) Need Help? 4. [-I1 Points] DETAILS SERPSE10 9.1.P.003. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A baseball approaches home plate at a speed of 50.0 m/s, moving horizontally just before being hit by a bat. The batter hits a pop-up such that after hitting the bat, the baseball is moving at 50.0 m/s straight up. The ball has a mass of 145 g and is in contact with the bat for 2.10 ms. What is the average vector force the ball exerts on the bat during their interaction? (Let the +X-direction be in the initial direction of motion, and the +y-direction be up.) I=on bat = N Need Help? 5. [-l2 Points] DETAILS SERPSE10 9.2.0P.003.MI. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A 44.6kg girl is standing on a 161-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity of 1.58i m/s relative to the plank. (a) What is the velocity of the plank relative to the ice surface? Z]? We (b) What is the girl's velocity relative to the ice surface? :iim/s Need Help? 6. [-I2 Points] DETAILS SERPSE10 9.2.0P.004. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER Gregory, with mass m is standing on a pallet of mass m . Both are originally at rest on a frozen lake whose surface is perfectly level. Gregory begins to 9' P walk along the pallet at a constant velocity Vgp to the right relative to the pallet. Here, gp represents Gregory relative to the pallet. Assume the surface is frictionless. (Use the following as necessary: mg, mp, and vgp. Note that the subscripts are lowercase. Assume the positive direction is to the right. Indicate the direction with the signs of your answers.) (a) What is the velocity VP]. of the pallet relative to the surface of the ice? vpl' = (b) What is Gregory's velocity v9]. relative to the ice surface? gi Need Help