WILL REWARD WITH BRAINILY ANSWER (i’m not creative please literally anything) if you could invent anything to benefit humankind what would it be and explain how it would be beneficial to humans

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.