The pipe in Fig. 2-44a is subjected to the force of F= 80 lb. Determine the angle between F and the pipe segment BA and the projection of
F along this segment.
7
2 ft
y
A
2 ft
С
0
1 ft
F = 80 lb
B
(a)
SOLUTION​

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.