An object of mass 20 kg is dropped from a height of 4 m. Fill in the blanks
in the following table by computing
the potential energy and kinetic
energy in each case.
E + EK
P
Height at
which object
is located
Potential Kinetic
energy energy
(E = mgh) (E = mc2/2)

Just above
the ground
For simplifying the calculations, take
the value of g as 10 m s2

PE = 800j, KE = 800J

Explanation:

To calculate the potential energy, we use the formula  

Potential Energy = Mgh

M = 20kg, g = 10m/sˆ2 , h = 4m

=20 × 10 × 4

=800J

At the maximum height  S = 4 and the initial velocity u = 0 The acceleration g = 10m/sˆ2

Using the third equation of motion

vˆ2 = uˆ2 + 2as

= 0ˆ2 + 2 × 10 ×  4

vˆ2 = 80

Kinetic Energy (KE) is given by  

KE = ½ mvˆ2

= ½ × 20 × 80

=800J  

no questions on whether they are allowed that right

the answer is the petition of right.

explanation:

offer to of right, real demand of attesting a benefit against the english crown, the most remarkable point of reference being the petition of right of 1628, which parliament sent to charles i fussing of a movement of oversteps of law. the term also implied the framework (invalidated in 1947) by which a subject could sue the crown.   taking a gander at the frameworks used by maria amidu to make a standard in 2015 commending the 1628 petition of right, which was sent to charles i by the english parliament. at uniquely based law the crown, or the sovereign in his official cutoff, couldn't be sued in the ruler's courts. since the ruler was, really, the superior ace of those courts, coordinating value in them between his subjects, he was not subject to their ward. therefore it transformed into a preparation, at whatever point a subject's certified or individual property had come into the responsibility for ruler or his specialists without legitimate perfect, for the subject to engage the master in chamber for its recovery.