2. (6 mark From the top of a tall building you threw one ball straight up with s
ID: 1660172 • Letter: 2
Question
2. (6 mark From the top of a tall building you threw one ball straight up with speed hall straight down with speed ~ (a) which hal has th·greater the ground? d Which ball gets to the ground t () Which ball displacemsent when it reaches the ground? (4) Which balveled distance when it hits the greund? the greater 3. (6 marks) A ball is connected to a light spring suspended vertically, as showa When displaced dowaward from its equilbrium pealtion and oscillates up and down. If air resistance is neglected, is the total mechanical energy the system (ball plus spring plus Earth) conserved? Hw many forms of potemtial energy are there for this situation? in the figure below. released, the bal 4/9Explanation / Answer
Answer (2).
(a) both the ball reaches the ground with same speed.
because a ball with straight up gains same velocity (V) at the top of a tall building in return journey. so both ball reaches the ground with same speed.
(b) the ball thrown straight down reaches the ground first because the ball thrown straight up travel large distance .
(c) both the ball have same displacement when they reaches the ground because displacement means the straight line distance between intial and final positions . both are thrown at same point and both are reach the same final point.
(d) the ball thrown straight up travel grater distance where it hits the ground.
Answer (3). If air resistances is neglacted , total mechanical energy of the system is conserved
There are three form of potential energy are for this situation
kinetic potential energy
elastic potential energy
gravitational potential energy
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