A 20-kilogram box is sitting on an inclined plane with a 30-degree slope. If the box is at rest, what is the force

on the box due to friction?

You push a disk-shaped platform tangentially on its edge 2.0 m from the axle. The platform starts at rest and has a rotational acceleration of 0.30 rad/s2.

What is inertia? Discuss which object among the following sets has more inertia and why. a. a more massive object or less massive object. b. fast moving object or a slow moving object

Is it possible for a distance-versus-time graph to be a vertical line? Explain.

Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a wrench from 3.00 m above the ground and measure that it hits the ground 0.

After three half-lives, one-ninth of an original radioactive parent isotope remains, and eight-ninths has decayed into the daughter isotope. A. TrueB. False

An anion is an atom that has lost electrons. True or False?

Question: Jane, looking for Tarzan, is running at top speed (4.5 m/s) and grabs a vine hanging vertically from a tall tree in the jungle.

Kim holds a pinwheel in the air and says it can be used to model a source of energy. Identify the type of energy Kim's pinwheel models. Explain the type of energy source used.

An example of a stable system

What causes chemical weathering? a. damage caused by animals and plants c. natural acids b. ice wedging d. physical factors