A 0.300-kg particle has a speed of 1.00 m/s at point circled A and kinetic energy of 7.60 J at point circled B.

(a) What is its kinetic energy at circled A? J

(b) What is its speed at circled B? m/s

(c) What is the net work done on the particle by external forces as it moves from circled A to circled B? J

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward