A spring launcher rests on the edge of a table 70 cm above the ground. The launcher makes
an angle of 30 with respect to the horizontal. A projectile of mass 100 g is pressed against
the spring, compressing it 6.0 cm. The spring is released and the projectile is red into the air
(ignore drag). It is observed to have a maximum height of 140 cm measured from the ground.
(a) What is the spring constant?
(b) What is the velocity of the projectile the instant before it hits the ground?

Question

A spring launcher rests on the edge of a table 70 cm above the ground. The launcher makes
an angle of 30 with respect to the horizontal. A projectile of mass 100 g is pressed against
the spring, compressing it 6.0 cm. The spring is released and the projectile is red into the air
(ignore drag). It is observed to have a maximum height of 140 cm measured from the ground.
(a) What is the spring constant?
(b) What is the velocity of the projectile the instant before it hits the ground?

anonymous · Answer

Can someone please provide a detail explaination of how to solve this problem. Thank you