Two metal spheres are suspended from strings. The
charge on sphere (a) is -2.0*10^2 C and the other (b)-4.0
*10^-8 C. Use the diagram to help you find the electric
force acting on the spheres?
3.0 m

A. An attractive force of 24*10^3 N

B. A repulsive force of 8.0*10^3 N.

C. An attractive force of 8.0*10^3 N

D. A repulsive force of 24*10^3N

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.

Ahockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player traveling east at 3.4 meters per second if the two players locked together momentarily in what direction will they be going immediately after the collision how fast will they be moving