Explain why friction makes it harder to push a box filled with groceries than an empty box

The kinetic energy of a car of mass 180kg moving at a constant velocity is 4410J. What is its velocity?

A boy throws a ball straight up with a speed of 21.5 m/s. The ball has a mass of 0.19 kg. How much gravitational potential energy will the ball have at the top of its flight?

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An aluminum wire having a cross-sectional area equal to 3.90 10-6 m2 carries a current of 6.00 A. The density of aluminum is 2.70 g/cm3. Assume each aluminum atom supplies one conduction electron per atom.

A gasoline engine with efficiency 25% delivers 1500 J of mechanical work per cycle. How much heat does this engine discard per cycle? (A) 6000 (B) 7500J (C) 4500J (D) 375 (E) 2000

an object travels in circular motion with a speed of 11.40 m/s. What is the centripetal acceleration if the radius of the circle is 5.52 m?

A single force acts on an object. The components of this force act along the + x-axis and the - y-axis. The single force that will bring the object into equilibrium has components that act along the a. + x-axis and + y-axis. C. - x-axis and + y-axis.

List 5 events that could trigger a mass movement?

What are some stressors of aquatic organisms

Which law describes the magnetic field in a nonlinear wire?