A wheel rotates with a constant angular acceleration of 4.50 rad/s^2. If the initial angular velocity is 3.75 rad/s, how much time is required to complete 28.0 rad? a. 0.70 s
b. 4.46 s
c. 7.47 s
d. 0.45 s
e. 2.79 s

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

What are the similarities & differences between a thermistor and a light dependent resistor in physics?