A 20-kg cart travels at 20 m/s in a circle with a radius of 20 m. What is the centripetal force?

20N

1N

400N

What is the major difference between static Electricity and current electricity

Building Restoration, Inc. (BRI), enters into a contract to refurbish an old train depot for Casual Dining, Inc., to open as Eat Up Restaurant. If BRI completes most of the work promised in the contract, its performance will be a.

A disk rotates freely on a vertical axis with an angular velocity of 50 rpm. An identical disk rotates above it in the same direction about the same axis, but without touching the lower disk, at 20 rpm. The upper disk then drops onto the lower disk.

6. A 0.09 kg arrow hits a target at 22 m/s and penetrates 4 cm before stopping. a. With what average force did the target exert on the arrow? b. With what average force did the arrow exert on the target? c.

What is the speed of a truck that travels 15 KM in 12 minutes

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

You are standing 100 meters from an object emitting a sound of constant intensity (loudness). You walk toward the source of sound until you are 20 meters from it. From your perspective, what has happened to the intensity of the sound?

What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field. (This is 60 rev/s.)

How do credit cards use magnets to work?

Which of the following describes a physical change? A. Formation of a new substance caused by combining substances B. Water changing from liquid to gas through evaporation or boiling C. Formation of a new substance caused by application of heat