Four 2 kg masses are connected by 1/4 m spokes to an axle as in
figure given below. A force F of 24 N acts on a lever 1/2 m long
to produce an angular acceleration a. The magnitude of a (in
rad/sec ) is :
(1) 24
(2) 12
(3) 6
(4) 3

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

What are similarities and differences between refraction, reflection, diffraction and absorption?

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?