Question

Q)When a body is projected vertically upward, the escape velocity from the earth's surface is 11.2 km/s. If the body is projected at an angle 30 degree with the vertical, the escape velocity will be
1)11.2/cos30kh/s
2)11.2km/s
3)11.2cos30km/s
4)11.2×sin30km/s
pls find the answer with explanation

Answer 1

Escape velocity will be same by the energy conservation law
Hence option 2