Answer:
18 m
Explanation:
G = Gravitational constant
m = Mass of planet = 
= Density of planet
V = Volume of planet assuming it is a sphere = 
r = Radius of planet
Acceleration due to gravity on a planet is given by

So,

Density of other planet = 
Radius of other planet = 

Since the person is jumping up the acceleration due to gravity will be negative.
From kinematic equations we have

On the other planet

The man can jump a height of 18 m on the other planet.
Answer:
(D) the sphere
Explanation:
The bodies given are Disk and Solid sphere (uniform sphere)
Moment of inertia of the bodies are
I(disk) =
I(sphere) = 
Since the moment of inertia of sphere is less than that of disk, therefore sphere will reach the bottom first.
The shortest and straight ones
Answer:
d
Explanation:
Ya gon find the Kenitic Energy first
K=½mv²===> K=½×0.2×(0.2)²===> 0.1(0.04)===> 0.004
and now the replacement:
0.004=½×0.4V²====> v²=0.02===> V=0.14m/s
Answer:
Land heats faster
Explanation:
Land heats faster because absorbs much more solar radiation.