(a) Suppose that the displacement of an object is related to time according to the expression x=Bt2. What are the dimensions of B? (b) A displacement x is related to time t by the equation x=A sin(2ft), where A and f are constants. Find the dimensions of A. (Hint: A trigonometric function appearing in an equation must be dimensionless.)

the diagram which shows forces as either balanced = same speed or unbalanced = accelerarting

b.

explanation:

10.0

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

a and c

c is 100% but i am confused in a