Question

A cup falls off of a table from a height of 0.75 m. What is the impact speed of the cup?

A. 5.15 m/s
B. 10.2 m/s
C. 3.83 m/s
D. 14.7 m/s

Answer 1

is the equation v = u + at @MayankD

Answer 2

no not this time since the displacement is given as opposed to time of free fall

Answer 3

are you familiar with the work energy theorem?

Answer 4

doesn't it cause the objects speed to change? @MayankD

Answer 5

Or we can use the equation v^2=u^2 + 2as
V->final velocity
u_.initial velocity
S->displacement
a->acceleration

Answer 6

so njust substitute initial velocity as 0 and s as 0.75 and a as 9.8m/s^2

Answer 7

just*

Answer 8

=0^2+2(9.8) is what i have so far.
what would the displacemnet be?
.75? @MayankD

Answer 9

yes

Answer 10

0^2+2(9.8)(.75)
=14.7
correct? @MayankD

Answer 11

Yes