1. A force acting on an object does no work if

A a machine is used to move the object

B the force is not in the direction of the object's motion

c the force is greater than the force of friction

A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 50.2 * 105 kg, of which 12.5 * 105 kg is fuel.

A boat is headed with a velocity of 18 meters/second toward the west with respect to the water in a river. if the river is flowing with a velocity of 2.5 meters/second in the same direction as the boat.

The decomposition of a substance by an electric current is called

What is the solution to - 6+5 (1-x) = - 13-7x

The difference between tension and traction?

What is one of the benefits that scientists have discovered from organisms' daily exposure to radioisotopes? 1. being able to Carbon date fossils 2. X-ray Imaging capability 3. radiation treatment for cancer 4. invention of microwave cooking

Despite valid research, in the late 1900s, women and minorities were thought to have a higher level of intelligence than white males

Radio communications were severely Distributed last week And the local newspaper says that solar activity is to blame. Which type of solar activity could the newspaper be talking about?

Why is it important for car designers to keep accurate records of their experimental procedures

When you bring the negatively charged balloon near a rod, how do the electrons move? The electrons move away from the balloon. The electrons do not move. The electrons move toward the balloon.