4. Three people are pushing a 500 kg of box in the same direction. Applied forces are 30 N, 20 N, and 10 N respectively. If the acceleration of the box is 0.02 m/s2, what is the magnitude of a force created by friction?

A box slides downwards at a constant velocity on an inclined surface that has a coefficient of friction uK =.58 The angle of the incline, in degrees, is most nearly:

On a farm, you are pushing on a stubborn pig with a constant horizontal force with magnitude 30.0 n and direction 37.0° counterclockwise from the + x-axis. how much work does this force do during a displacement of the pig that is (a) s s = 15.

Whic ones are true and false? a. The internal energy of a system decreases when work is done on the surroundings. b. The internal energy of a system increases if heat flows from the surroundings to the system. c.

two individuals start the training program at the same time, but one is able to grow muscle faster an larger than other. what is the least likely explanation for this?

What have you noticed when you pulled the magnet on top perpendicularly across the other? What does this tell you about the magnetic field around the latch magnet?

How much would a 100kg man weigh on the surface of the sun where the acceleration is 274 m/s

How much current is in a circuit that includes a 9 - volt battery and a bulb with a resistance of 12 ohms?

Find the current Voltage VD and current ID in the following circuit assuming (a) ideal diode. (b) Constant voltage drop model with Von = 0.75V (c) using the exponential model (I_0=1*10^ (-14)). Verify your results through Multisim simulation

Suppose two stars are located in region a of the h-r diagram shown in the figure below. Star X appears much dimmer that Star Y as seen from Earth. Which Star can be inferred to be nearer to Earth, and how do you know?

A student examining a joint observes collagen-rich connective tissue fibers linking the bones, but finds no synovial cavity. Which structural classification fits the observed joint?