A ball is thrown with a velocity of 40 m/s at an angle of 30° above the horizontal and attains a certain range R. At what other angle will this ball attain the same range keeping its initial velocity the same?

This ball will attain the same range at 60°.

Explanation:

Projectile motion: when an object is thrown in such a way that it form an angle with horizon, the force act on it that is the acceleration due gravity. This type of motion is known as projectile motion.

Range: The horizontal distance is covered by an object.

Range

u = initial velocity = 40 m/s

θ = 30°

g = gravity =9.8 m/s²

Next,

Range and u = 40 m/s

This ball will attain the same range at 60°.

c. newton's third law of motion

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000