noname

I'm eighteen and I really want a lip piercing (Snake bites). I'm aware of the scarring.

My dilemma:

I plan on pursuing an occupation in computer science. Before I do that though, I'm going to have to save up money, attend community college, then transfer to a university. So It'll have years til I even try applying for my life career job.

A friend throws a baseball horizontally. He releases it at a height of 2.0 m and it lands 21 m from his front foot, which is directly below the point at which he released the baseball.

(a) How long was it in the air?

(b) How fast did he throw it?

Stephan Hawkins worked extensively with theoretical gravitational physics. He is well known for his work with black holes. He passed on March 14th, 2018. It has been observed that a certain star (S2) in the Sagittarius A* (meaning in the direction of the constellation Sagittarius) is orbiting a supermassive black hole. If the period of S2 is 16year and the distance between the two is 1.79e13m. What is the mass of this black hole?

A. They are high enough above the earth’s surface that they have escaped the pull of earth’s gravity.

B. The space shuttle has anti-gravity devices on it that allow the astronauts to float inside it.

C. The astronauts are falling at the same rate as the space shuttle as it orbits around earth.

D. Orbiting objects do not experience any gravity.

Suppose the radius of a bicycle wheel is .375 meters. If it rotates at 3 revolution per second when you are riding the bicycle, then your speed (linear velocity) will be

A diver jumps up off a diving board with an initial velocity of 3.75m/s. What is their velocity when they reach the water 4.0m below? (assume perfect physics)

When playing shuffleboard, a player exerts a constant force of 2.1 N on an initially stationary puck, at an angle 55° below the horizontal. If the player pushes the puck for 1.5 m, how fast is the puck moving when it is released? The mass of a puck is 0.49 kg. Ignore the force of friction. show work

An old car is traveling down a long, straight, dry road hill (angle of incline 7.00°) at 25.0 m/s when the driver slams on the brakes, locking the wheels. The car comes to a complete stop after sliding 44.0 m in a straight line. If the car has a mass of 755 kg, what is the coefficient of kinetic friction between the tires and the road?

A block of mass 5kg sits on an inclined plane, which is slowly being raised. The block remains motionless until the angle the plane makes with the horizontal is 22°. At this angle, the block begins to slide down the plane. What is the coefficient of static friction between the plane and the block?

A roller coaster will accelerate its riders from rest to 33.5m/s in 4.00 seconds.

1. What is the magnitude of the average acceleration of a rider?

2. What is the average net force on a 45.0 kg rider during these 4.00 seconds?