Suppose you throw a small rock over a lake so that it sails over the surface of the water. the rock has a mass of 0.090 kg and is initially moving at 8.0 m/s. how much net force does it take to bring the rock to a stop in 1.00 s?

a. 89 n

b. 0.120 n

c. 0.72 n

d. 0.011 n

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.