A bird has a mass of 0.2kg and is flying 10m above the ground with a speed of 7 m/s. What is the total mechanical energy of the bird?

25 joule.

Explanation:

solution

here,

given

mass =0.2 kg

speed or velocity = 7m/s

kinetic and mechanical energy =10 m

mechanical energy = ?

now,

kinetic energy = 1/2 = m * (v)2

= 1/2 = 0.2kg * (7)2

= 1/2 = 10

=5J

hence , total kinetic energy of the bird is (5+10)=15J

again,

we have,

mechanical energy =kinetic energy + potential energy

= (15+10)J

= 25J

hence, the mechanical energy of the bird is 25J.

here ,some formula and unit related to this question.

kinetic energy= 1/2=m*(v)2

kinetic energy = speed

mechanical energy= (knietic+potential )energy

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft