A boy pulls a sled 46 m across a flat field with a force of 120 N. The force acts on the sled through a rope at a 23° angle with the horizontal. What is the work the boy does on the sled? (Round your answer to two significant figures.)

A child slides down a slide with a 24° incline, and at the bottom her speed is precisely three-fifths what it would have been if the slide had been frictionless. calculate the coefficient of kinetic friction between the slide and the child.

What speed is a car going if it takes 2 hours to go 80 miles?

Two lab partners are doing a static electricity investigation. They begin with a negatively-charged aluminum pie plate. After conducting the procedure, they observe that the pie plate has become electrically neutral.

30. A student correctly determined the density of two rocks. If the volumes of the two rocks are equal, the rock with the greater density has a A. rounder shape B. smoother surface C. greater mass D. smaller size

A 150 cm long string vibrates with 3 loops and its frequency is 80 Hz. What will be the wavelength and velocity of the waves?

Projectile motion is an example of what kind of motion

What can change scientific knowledge?

6. What is ductility?

During practice, a baseball player hits a very high fly ball, and then runs in a straight line and catches it. Which had the greatest displacement during the time period from the hitting of the ball to its catching

Why are glass fibers stronger than bulk glass?