A child is stationary on a swing. The child is given a push by his brother to start him swinging. His brother applies a steady force of 84 N over a distance of 0.25 m. Calculate the work done by this force.

A small, solid cylinder with mass = 20 kg and radius = 0.10 m starts from rest and rotates without friction about a fixed axis through its center of mass.

The number placed in front of a compound to balance a chemical reaction.

What is speed? 1. time per distance (hours per mile or seconds per meter) 2. distance (miles or meters) 3. distance per time (miles per hour or meters per second) 4. time (hours and seconds) I know its 3 but I just want to make sure I am 100% sure

Convert 80°f to celsius

Consider two gratings. One grating has 3000 lines per cm, and the other one has 6000 lines per cm. Both gratings are illuminated with a beam of the same monochromatic light. Which grating produces the greater separation of colors?

The bodies of birds are streamlined. Why. When we strike a matchstick with a rough surface it catches fire. why Grooves are made in tyres. why Discuss how friction plays a vital role in daily life.

What will be the force if they are moved so they are only one-eighth as far apart?

NaBr + H3PO4 = Na3PO4 + HBr

Which example describes constant acceleration due only to a change in direction

A roller coaster car travels up and down the hills of its track. Neglecting friction, the sum of its kinetic and potential energy A. equals the sum of the thermal energy generated by friction during the ride. B.