A body of mass 50kg is raised to a height of 2 meters above the ground. What is its potential energy? If the body is allowed to fall, find its kinetic energy just before impact with the ground?

A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 4.0 cm. If a timer is started when its displacement is a maximum (hence x = 4 cm when t = 0), what is the speed of the mass when t = 3 s?

Reaction time is the lapse of time between muscular movement and external stimuli. True or false

How do atoms of metallic elements bond

Do the amps of a circuit stay the same everywhere if it's series and split if it's parallel

Ways to accelerate an object

Examples of useful high and low friction

A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. She produces an angular acceleration of 39 rad/s2 and her lower leg has a moment of inertia of 0.619 kg m2.

Electromagnetic waves have the ability to travel through empty space because they do not require a medium to travel through. True or False?

Ask Your Teacher A block in the shape of a rectangular solid has a cross-sectional area of 3.00 cm2 across its width, a front-to-rear length of 15.1 cm, and a resistance of 945 Ω. The block's material contains 5.33 ✕ 1022 conduction electrons/m3.

What is the term for the depth of the water needed to float a boat clear of the bottom?