Physics test tomorrow need help, im not good in physics?

1. A skydiver w/ an open parachute approaches the ground at a constant velocity. The wind does not blow her from side to side. What forces are acting on her? Is she equilibrium? Why or why not?

2. When a car accelerates quickly, passengers feel that they are thrown backwards. When the brakes are put on quickly, the passengers feel that they are thrown forward. Explain what is occuring in both cases. Be sure to explain where Newton’s First Law comes into play.

3. A man pushes a stalled car w/ a horizontal force of 312N. The car does not move. What is the frictional drag force on the car?

4. website please look http://i23.photobucket.com/albums/b354/Sunshinegirl93534/number3.jpg

5. A stunt man is being pulled, at a constant velocity, along a rough road by a cable attached to a truck. The cable is parallel to the ground. The mass of the stunt man is 109kg, and the coefficient of kinetic friction between the road and the stunt man is 0.870. Find the tension in the cable.

Top 4 Answers

A few days ago

diva_l

Favorite Answer

Do your own homework!

A few days ago

Anonymous

1. I don’t think Wierdo is quite right about normal force, because normal force is any force component perpendicular to the surface, it is not a “force” technical. The more appropriate nomenclature here would be the force of friction from atmosphere that exactly opposes(having the same magnitude) the force of gravity. Since the diver is in a constant velocity, there is no acceleration, and, consequently, zero total force acting on the diver and in the state of equilibrium.

2. Weirdo pretty much answers it. This question is just a paraphrase of the law of inertia.

The rest are just details for you to work it out, too lazy here, lol. Acutally, 3 is pretty easy, it is just 312N, at the magnitude that balances exactly the horizontal force.

A few days ago

Anonymous

1. There is a normal force acting up and gravitational force acting down. She is in equilibrium since she is traveling in constant velocity

2. When the car is driving, the passenger is also traveling with the car. So the passenger seems to be staying at one place while the car is moving. But in reality, both the passenger and the car is moving, so when the car stop, it is the car that is actually stop, not the passenger, so the passenger continues to travel forward.

That’s all I’m going to answer, sorry, I’m too lazy to calculate anything…

4 years ago

Anonymous

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Physics test tomorrow need help, im not good in physics?

Physics test tomorrow need help, im not good in physics?

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