HW: Lab Make Up (click the link above to view the same assignment as a file)
Using F=ma (as well as other equations we’ve seen in the past)
What would be the net force on the following objects?
- You push your grandma on a skateboard (mass of 70 kg) and she accelerates at a rate of 1.5 m/s/s right.
- You and your friends have a tug-a-war contest. You pull left with 80 N. George pulls left with 110 N. Simeon pulls left with 115 N. Ali, Mustafa, Branden, and Jake each pull right with 60 N of force.
- A car crashes from 30 m/s to a stop in 0.1 seconds. It has a mass of 900 kg.
- A jet speeds up from 200 m/s to 260 m/s in 3 seconds. It has a mass of 500 kg.
- Draw a freebody diagram for the jet from Question 5.
Answer the following questions completely.
- Grandpa in his rocket-powered wheelchair is riding down the race track. He and his wheelchair have a combined mass of 90 kg and start out moving with a speed of 0 m/s. Friction pulls against him with a constant force of 120 N, but he accelerates forward anyways (due to the rocket-powered wheelchair) at a rate of 2 m/s/s. What is the net force? With how much force is the wheel chair pushing?
- How far would Grandpa (from above) travel after 45 seconds?
- What would happen to the acceleration of an object if you applied a stronger force to it?
- What would happen to the acceleration of an object if you applied the same force, but you added more and more mass on top of that object?
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