What data are needed to calculate the actual mechanical advantage of a machine

As a rocket travels upward from earth, air resistance decreases along with the force of gravity. The rocket's mass also decreases as it uses up its fuel. If thrust remains the same, how do these factors affect the rocket's acceleration

Which object has the greatest inertia? (1) a 15-kg mass traveling at 5.0 m/s (2) a 10.-kg mass traveling at 10. m/s (3) a 10.-kg mass traveling at 5.0 m/s (4) a 5.0-kg mass traveling at 15 m/s

What is the momentum of a 0.1-kg mass moving with a speed of 5 m/s?

Two objects exert a gravitational force of 3 N on one another when they are 10 m apart. What would that force be if the distance between the two objects were reduced to 5 m? A. 1.5 N B. 6 N C. 12 N D. 24 N

An object accelerates in a direction that is always perpendicular to its motion. what is the effect if any of the acceleration on the objects speed and direction

Scenario A: 120 J of work is done in 6 s. Scenario B: 160 J of work is done in 8 s. Scenario C: 200 J of work is done in 10 s. Which scenario uses the most power?

Which of the following is the most accurate description of the relationship between velocity and acceleration? A. Velocity and acceleration are the same thing. B. Velocity is a type of acceleration. C. Acceleration is a change in velocity. D.

The force needed to move an object 14 meters with 83 joules of work is what?

What is the relationship between fossil fuels and energy? A. Fossil fuels are a form of mechanical energy. B. Fossil fuels are a form of chemical energy. C. Fossil fuels are a form of geothermal energy. D. Fossil fuels are a form of nuclear energy.

A horizontal piston-cylinder compresses adiabatically 1 mol of propane gas, initially at 350 K, from 0.04 to 0.01 m3.