Work and Energy

Suppose a car approaches a hill and has an initial speed of 120 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill.a) if the car... more

04/01/22

What are the forces that are holding up the plank?

Two painters are standing on a plank while painting a building. The plank is uniform, weighs 72.0 lb, and is 16.0 ft long. The plank is being held up by two forces that are 1.25 ft in from each... more

04/01/22

Question on probability/sets

You have a basket containing 7 red balls, 5 green balls, and 2 orange balls. You pick 5 balls at random. What is the probability of getting at least one red ball?

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