# Fabricus

Most popular questions and responses by Fabricus-
## Physics

A golf ball is released from rest from the top of a very tall building. Choose a coordinate system whose origin is at the starting point of the ball, and whose y axis points vertically upward. The acceleration of gravity is 9.8 m/s^2. a.Neglecting air

*asked on February 9, 2014* -
## Physics

A student drops a rock from a bridge to the water 10.1 m below. The acceleration of gravity is 9.8 m/s^2. With what speed does the rock strike the water? Answer in units of m/s.

*asked on February 2, 2014* -
## Physics

A. Consider the motion of a projectile. It is fired at t= 0. Its initial speed is 12 m/s and its initial projection angle is 50◦ from the horizontal. The acceleration of gravity is 9.8 m/s^2. What is the maximum height,h, of its trajectory? Answer in

*asked on February 19, 2014* -
## Physics

A. Given two vectors ~F1, and ~F2. Where the magnitude of these vectors are F1= 81 N, and F2= 90 N. And where θ1= 80◦,and θ2= 22◦. The angles are measure from the positive x axis with the counterclockwise angular direction as positive. What is the

*asked on February 19, 2014* -
## Physics

1. Consider four vectors ~F1, ~F2, ~F3, and ~F4, where their magnitudes are F1= 57 N, F2= 38 N, F3= 25 N, and F4= 67 N. Let θ1= 130◦, θ2=−130◦, θ3= 29◦, and θ4=−64◦, measured from the positive x axis with the counter-clockwise angular

*asked on February 14, 2014* -
## Physics

An artillery shell is fired at an angle of 55.7◦ above the horizontal ground with an initial speed of 1690 m/s. The acceleration of gravity is 9.8 m/s^2. a.Find the total time of flight of the shell, neglecting air resistance. Answer in units of min.

*asked on February 16, 2014* -
## Physics

1. Two blocks on a frictionless horizontal surface are connected by a light string. where m1 = 6.21 kg and m2 = 19.5 kg. A force of 48.4 N 6.21kg --T-- 19.5kg ----->48.4 N The acceleration of gravity is 9.8 m/s^2. Find the acceleration of the system.

*asked on March 6, 2014* -
## Physics

During a baseball game, a batter hits a pop-up to a fielder 78 m away. The acceleration of gravity is 9.8 m/s^2. If the ball remains in the air for 5.7 s, how high does it rise? Answer in units of m.

*asked on February 19, 2014* -
## physics

A speedboat increases in speed from 21 m/s to 30.9 m/s in a distance 191 m. Find the magnitude of its acceleration.

*asked on February 1, 2014* -
## Physics

The rectangular and polar coordinates of a point are (x, y) and (r, θ), where x= 4 and θ= 46◦. a. Determine the value of r. b. Determine the value of y.

*asked on February 14, 2014* -
## Physics

Consider four vectors ~F1, ~F2, ~F3, and ~F4, where their magnitudes are F1= 57 N, F2= 38 N, F3= 25 N, and F4= 67 N. Let θ1= 130◦, θ2=−130◦, θ3= 29◦, and θ4=−64◦, measured from the positive x axis with the counter-clockwise angular

*asked on February 14, 2014* -
## Physics

A ball thrown straight up at ground level passes a height of 115.7 m in 5.6 s. The acceleration of gravity is 9.8 m/s^2. What was its initial speed? Answer in units of m/s.

*asked on February 9, 2014*