Physics! Someone help me! Its due today please!

Assume a 9.0 kg bowling ball moving at 5 m/s bounces off a spring at 2 m/s.

(a) What is its change in velocity of the bowling ball?

(b) What is its change of momentum of the ball?

(c) What is the impulse exerted on of the ball?

(d) If the interaction with the spring occurs in 0.3 s, calculate the average force the spring exerts on the ball.

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

the answer would be c. motion and direction

i hope this : )

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be