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A 70 kg passenger is in a car moving at 36 km/h that crashes into a tree and stops in 0.22 s What is the magnitude of the average force of the seat belt on the passenger to bring them to a halt? Treat the direction of motion to be positive. Include units as appropriate, Fm = Suppose a soft clay model of a koala bear has a mass of 150 g and slides on ice at a speed of 0'8 m/sl It slides into a second model, which is initially stationary and has a mass of 400 g. Both being soft clay they stick together upon collision. What is their final speed? Include units as appropriate. A person enjoying a game of lawn bowling rolls a 0.50 kg ball (ball '1') at a speed of 35 m/s head-on into a stationary target ball of mass 2.5 kg (ball '2') Treat the resulting collision as elastic , By applying conservation of momentum and conservation of kinetic energy, then solving the two resulting equations by substitution, what are the velocities of the two balls immediately after the collision? Treat the initial direction of motion to be positive' Include units as appropriate below ,5? II a to