Question

The Lunar Roving Vehicle used in NASA's late *Apollo*
missions reached an unofficial lunar land speed of 5.0 m/s by
astronaut Eugene Cernan. If the rover was moving at this speed on a
flat lunar surface and hit a small bump that projected it off the
surface at an angle of 28°, how long (in s) would it be "airborne"
on the Moon? (The gravitational acceleration on the Moon is
one-sixth that of Earth.)

Answer #1

- Hi guys this question of prjectile motion is very easy
- Rover is moving at the speed of 5 m/sec and hit a small bump. Assuming that the bump was purely elastic collision and no kinetic energy of the rovers lost
- Now, rover is projected off at the same speed but at an angle of 28° . to find the time it will take to reach back to the surface is calculated ,below

Formula for time of flight of any projectile is T=2vsin()/g"

here g" = gravity of the moon =g/6=10/6=5/3

=28° putting all the values

T = 2*5*sin(28)*3/5=1.6254

The Lunar Roving Vehicle used in NASA's late Apollo missions
reached an unofficial lunar land speed of 5 m/sby astronaut Eugene
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surface and hit a small bump that projected it off the surface at
an angle of 23∘.
(a) how long would it be "airborne" on the Moon?
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