Thursday
December 5, 2013

# Posts by cory

Total # Posts: 91

physics
A vertical spring (k = 1040 N/m) is compressed a distance of 11.6 cm. A 47.9 g mass is placed on the spring, then released so the mass flies upward. When the mass is 120 cm above the spring, what is the speed of the mass?

physics
Because work=force*distance. The net force is zero for a car traveling along a level road at constant velocity. The zero total work explains why the car’s speed doesn’t change.

physics
A 710 kg car travels along US-321. How much working is needed to keep the car traveling at a constant speed of 21.1 m/s around a curve of radius 28.2 m?

physics
A person pulls on a 41 kg table with a 203 N force acting at an angle of 27.1 degrees above the horizon. The frictional force on the table is 120 N. What is the speed of the desk after it has moved 2.3 m?

physics
A box of mass 11.9 kg is pulled to the right with a horizontal force of 11.3 N. The box moves to the right with constant velocity, 1.6 m/s. Determine the amount of working the pulling force and the normal force do if the box moves 5.7 m.

physics
A 50. kg cart is moving across a frictionless floor at 2.0 m/s. A 70. kg child, riding in the cart, jumps off so that the child hits the floor with zero velocity. What was the velocity of the cart after the boy jumped?

physics
A 50. kg cart is moving across a frictionless floor at 2.0 m/s. A 70. kg child, riding in the cart, jumps off so that the child hits the floor with zero velocity. What was the velocity of the cart after the boy jumped?

physics
An astronaut whose mass is 80. kg carries an empty oxygen tank with a mass of 10. kg. The astronaut throws the tank away with a speed of 2.0 m/s. With what velocity does the astronaut start to move off into space?

physics
The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.

physics
The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.

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