Question

speed of 100 km/h, and the rest of its 330-km journey at a speed of 120 km/h. Find the
8. A train covers the first 60 km of its journey at a speed of 80 km/h, the
total time taken to complete its journey. Also, find its average speed.
5
of its journey at
ton
If it covers​

Answer 1

Answer:

The gravitational potential energy of mass m is 10J. What minimum energy is required to projects the body out of the gravitational field of earth?

a)2X10^7J

b)10^7J

c)3X10^-3J

d)none of the above

Explanation:

By subtracting 3 from both sides, we get

y + 3 – 3 = 10 – 3

⇒ y = 10 – 3

⇒ y = 7 ans