This document provides 4 problems involving impulse, momentum, and collisions. Problem 1 asks to calculate the force exerted on a 2000 kg car that collides with a tree when stopped in 0.01 s or 0.5 s. Problem 2 involves calculating impulse, change in momentum, and final speed given an applied force of 60 N over 10 s on a 30 kg body initially at rest. Problem 3 asks how fast Superman must run to have the same momentum as a 12500 kg train moving at 5 m/s in the same direction, given Superman's mass is 50 kg. Problem 4 involves calculating the momentum of a delivery truck, driver, and rice before and after loading additional rice cavans, maintaining the original speed.
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Impulse and Momentum
1. Impulse and Momentum
DIRECTIONS: Solve the following problems. Show the solution and box the final
answer.
1. A car and its driver have combined mass of 2000 kg. The car is initially moving at
20 m/s and collides head on with a tree. Find the force exerted on the car and the
driver assuming that (a.) the car is rigid and brought to stop in 0.01 s. (b.) the car
has crumple zone and brought to stop in 0.50 s.
2. A force of 60 N acts on a 30-kg body for 10 s. (a.) Find the impulse produced by
the force, (b.) the resulting change in momentum of the body, and (c.) the speed
of the body at the end of 15 s. Assume that the body starts at rest.
3. How fast must Superman run to have the same momentum as 12500-kg train
moving at 5 m/s in the same direction? Assume that the mass of Superman 50
kg.
4. A delivery truck carrying 100 cavans of rice is travelling at 4.0 m/s. The mass of
the truck and one cavan of rice are 3000 kg and 50 kg respectively. The driver of
the truck has a mass of 85 kg. (a.) What is the magnitude of the driver and the
truck with the cavans of rice? (b.) At a certain grocery the driver loaded 8 cavans.
What is the new the new momentum of the truck with the driver and the cavans
of rice if the driver maintains the same speed?
