You are driving a car behind a truck. both your car and the truck are moving at a speed of 80 km/hr. if the driver of that truck suddenly slams on the brakes, what minimum distance between your car and the truck is needed so that your car does not crash into the truck's rear end? (the truck and the car have the same braking acceleration.) indicate any assumptions that you made. for both the truck and the car, draw an acceleration- and velocity-versus-time graph.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge

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.

the rearrangement of particles in a physical change. hope this