a skate boarder starts from rest and accelerates a distance of 485 m reaching a final velocity of 20 m/s. How long does it take?

The formula for distance divided by time

What statement is true according to newton's first law of motion? a. in the absence of unbalanced force an object at rest will stay at rest and an object in motion will come to a stop. b.

Un patinador recorre un parque de 7.2 km de largo a una velocidad de 5 m/s? cuantas horas duro su recorrido?

A flywheel with a very low friction bearing takes 1.6 h to stop after the motor power is turned off. The flywheel was originally rotating at 55 rpm. What was the initial rotation rate in radians per second?

What is tan (27°) ? A. 0.89 B. 0.51 C. 0.45 D. 0.27

A meteorologist wants to measure the temperature. Which weather instrument should the meteorologist use? a. a barometer b. a rain gauge c. a thermometer d. a weather vane

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

A person lifts a 4.5 kg cement block a vertical distance of 1.2 m and then carries the block horizontal - ly a distance of 7.3 m. determine the work done by the person and by the force of gravity in this process.

A tree is standing in the middle of a meadow. As you watch, the wind begins to blow and the tree bends. Which statement best explains how you could tell that a net force was acting on the tree? OA) The tree had momentum.

A 5.1 kg black bear cub weighs 49.98 N. The cub is carried by its mother up into the safety of a white pine tree.