A 2.1-kg brick is placed gently upon a 2.9-kg cart originally moving with a speed of 26 cm/s. determine the post-collision speed of the combination of brick and cart.

A trolley of mass 200kg is travelling north at 2m/s. It collides head on with a second trolley of mass 500kg which is travelling south with a velocity of 5 m/s and they remain coupled together.

What gas is found in the greatest abundance in the modern atmosphere? A. Neon B. Oxygen C. Nitrogen D. Helium

The ability to do work is a. energy. c. momentum. b. power. d. all of the above.

How much will you save if you buy and item listed at $175.50

What are the first 20 elements and their chemical symbols

Which answer choice best explains why nuclear reactions release more energy than chemical reactions? Electrostatic forces of repulsion are thousands of times stronger than gravitational forces.

A train's mass is 18181.81 kg. What is its weight?

a 3.0m long frictionless pendulum swings with a maximum angluar displacement of 10 degree from the vertical. at its lowest position the kinetic energy of the pendulum is 20.0j what is the potential energy of the pendulum when the kientic energy is 5.

How are hypotheses and theories related to each other?

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?