A ball is thrown vertically upwards in the air. Which of the following statements about the motion of the ball is false?
A: The ball will be travelling as fast as it was when it gets back to the ground
as it was when first thrown upwards.
B: The ball will be stationary for an instant at the highest point in its flight.
C: The direction of the force on the ball changes so the ball falls back to the
ground.
D: The direction of the acceleration is always downwards.

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

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west