It takes 40 j to push a large crate 4 m across a floor the force exerted on the crate i

Why is the mechanical advantage of using a single pulley always 1? Assume there's no friction.

While John is traveling along a straight interstate highway, he notices that the mile marker reads 239 km. John travels until he reaches the 149 km marker and then retraces his path to the 167 km marker.

Which of the following are examples of natural forces? A) Phase B) optical C) Gravity D) Nuclear

Lightning is more likely to strike a metal tower than a rubber hose because:

What is the total resistance of 3 resistors of 3ohms added together in series?

What conditions in the nucleus are likely to result in the nucleus breaking apart? A. When the repulsion of the strong force is weaker than the repulsion of the electrostatic force B.

What color do you see when all colors of light are reflected

A ball is thrown with a velocity of 20 m/s at an angle of 60 degrees above the horizontal. What is the horizontal component of its instantaneous velocity at the the exact top of its trajectory?

You pull on a wagon resting on the sidewalk. What will happen next. A. The wagon does not move because the wagon applies more force to you than you apply to the wagon. B. The wagon moves because you apply more friction to the ground. C.

If someone travels 3000 feet in one second, how far will it travel in 18 minutes