Other Physics Answers

A 40-kilogram mass is moving across a horizontal surface at 5.0 m/s. What is the magnitude of the net force required to bring the mass to a stop in 8.0 seconds?

Can 500 year old rope survive under fresh water intact

A close look at the diagram below shows graphite (or sometimes water) is used as a moderator to slow neutrons, reference the Periodic table to identify what two metals are used to absorb neutrons. *

How much work is done on a bookshelf being pulled with a force of 53.8 N for a distance of 5.00 m at an angle of 37.0o from the horizontal?

When you load a heavy box into a big moving truck, it is often easier to push it up a sloped frictionless ramp to the back of the truck than to lift it directly up into the truck. Yet, the change in the gravitational potential energy of the box is the same no matter how you get it from the ground into the moving truck.

Compare the amount of work you must do to lift the box directly into the truck with the amount of work you need to push the box up the frictionless ramp.

A stone projected horizontally from the top of a tower with a speed of 5m/s. It lands on the ground level of the horizontal distance of 20m from the top of the tower. Calculate the height of the tower. g= 10m/s²

A beach ball is rolling in a straight line toward you at a speed of 0.5 m/s. Its momentum is 0.25 kg*m/s.

What is the mass of the beach ball?

A gardener pushes a lawnmower of mass 18kg at a constant speed. To do this requires a force P of 80N directed along the handle, which is at an angle of 40°to the horizontal.

a) Calculate the horizontal frictional force

b) If this frictional force were constant, what force, applied along the handle, would accelerate the mower from rest to 1.2m/s in 2.0s?

the erth is on average 150 million kilometers from the sun calculate it's average speed in orbit?

4. A constant force of 45N acts on a 15 kg box. The direction of the force is to the left. If the box is originally at rest, what will be its velocity after 5s? Indicate the magnitude and direction of the velocity.