Q1. A 73 trampoline artist jumps vertically upward from the top of a platform with a speed of 4.0. If the trampoline behaves like a spring of spring constant 6.2×104, how far does he depress it?
Q2. A jumper of mass m=70 kg starts in a crouched position with the jumper's center of mass at a position y1=0 m. Just before the jumper leaves the floor, his or her center of mass is at y2=0.7 m.
Q3. A 320 g block on a 70 cm long string swings in a circle on a horizontal, frictionless table at 60 rpm.
What is the Speed of block?
What is the tension of string?