A 2-kg block A is pushed up against a spring (they are not connected), compressing it a distance = 0.1 m. The block is then released from rest and slides down the 200 incline until it strikes a 1-kg sphere B that is suspended by a 1.0-m inextensible rope. The spring constant k = 800 N/m, the coefficient of friction between A and the ground is 0.30, block A slides from the unstretched length of the spring a distance d = 1.50 m, and the coefficient of restitution between A and B is 0.8. The final angle of the pendulum is intended to be:

33: i think it’s b

radiation

explanation:

heat is transmitted by radiation

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.