you need to walk to class 200 meters away and can only walk 2 m/s. how much time will it take you to get to class

1. What conditions must exist in order for a force to do work on an object?

In which situation is no work considered to be done by a force? A. when the angle is between the force and displacement is 180 B. when the angle is between the force and displacement is 90 C.

Which of the following causes an object to move in a curved path? A. centripetal force B. friction C. the object's mass D. the object's weight

If two collinear vectors A and B are added, the resultant has a magnitude equal to 4.0. If B is subtracted from A, the resultant has a magnitude equal to 8.0. What is the magnitude of A?

A box with a total surface area of 1.88 m^2 and a wall thickness of 2.44 cm is made of an insulating material. A 14.1 W electric heater inside the box maintains the inside temperature at 18.6 ◦C above the outside temperature.

An object becomes charged when the atoms in the object gain or lose. True or False

A container has 79000cm3 of mercury. Find the mass of mercury if the density is 13.6g/cm3

Explain how the movement of groundwater is related to the water cycle.

Two masses are attracted by a gravitational force of 400 N. What will the force of attraction be if each of these two masses is halved?

What kind of light would be the best to use to look inside a cold dark cloud and see the warm stars forming inside?