A force of 450 n accelerates a box across a frictionless surface at a rate of 15 m/s2. what is the mass of the box?

A bolt drops from the ceiling of a moving train car that is accelerating northward at a rate of 2.50 m/s^2. (a.) What is the acceleration of the bolt relative to the train car? (b.) What is the acceleration of the bolt relative to the earth?

Approximately how long does it take a star the size of the sun to become a red giant? a) 2 million years b) 10 million years c) 45 billion years d) 25 million years

An acorn falls from rest from the top of a 21 m tall oak tree. A. How long does it take for the acorn to fall to the ground? B. How fast is the acorn going before it hits the ground?

Who invented evolution?

phys 10 The speed of light is roughly 300,000,000 meters per second (m/s). In scientific notation, this quantity is:

Imagine you are on a roller coaster, riding a skateboard, or running across the ball field. What are some clues that you are moving?

In vacuum, red light travels at a greater speed than blue light does. a. true b. false?

When the sun is directly overhead, a hawk dives toward the ground with a constant velocity of 5.35 m/s at 52.0° below the horizontal. Calculate the speed of its shadow on the level ground. M/s?

How do the tension of the cord and the force of gravity affect a pendulum? A. They are the competing forces that act on a pendulum as it swings. B. They are the two factors that affect the period of a pendulum. C.

What is an example of static friction