At a given instant in time, a 18-kg rock is observed to be falling with an acceleration of 7.75 m/s2. What is the magnitude and direction of the gravitational force on the rock?

What is the difference between tangential acceleration and centripetal acceleration?

A bar has a length of 8 in. and cross-sectional area of 12 in2. Part A Determine the modulus of elasticity of the material if it is subjected to an axial tensile load of 10 kip and stretches 0.006 in. The material has linear-elastic behavior.

Determine the rotational period of Saturn in earth years

1. What are three appliances in your house that use a motor that turns electrical energy into mechanical energy?

How do scientists construct models of atoms and molecules?

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.

The amplitude of a sound is the Group of answer choices frequency of the sound. magnitude of displacement of a sound pressure wave. psychological aspect of sound related to timbre. amount of sound energy falling on a unit area.

Air at 38°C and 97% relative humidity is to be cooled to 18°C and fed into a plant area at a rate of 510 m/min. a. Calculate the rate (kg/min) at which water condenses. b.