weight=gravity x mass
1. What is the weight of a 45 kg girl on:
(a) the Earth, where g = 10 N/kg
(b) the Moon, where g = 1.6 N/kg
45x10= 450N
mass= weight/gravity
1.6x 45=72
2. A car has a weight of 10,000N. What is the mass of the car on Earth (g= 10 N/kg)?
10000/10=1000kg
3.If a 75 kg TV is taken to Venus, where it weighs 665N, what is acceleration due to
gravity on Venus?
665/75=8.9N
weight/mass= gravity
20N
4. The force of gravity on Jupiter is a little more than 2 times the gravitational force on
Earth. If an object has a mass of 50 kg and a weight of 490 N on Earth, what would be
the object’s approximate mass and weight on Jupiter?
weight= mass x gravity
490/50=9.8N
20x50=1000N
50kg
5. Of all the planets in our solar system, Jupiter has the greatest gravitational strength.
(a) If a 0.500-kilogram pair of running shoes would weigh 11.55 newtons on Jupiter, what
is the strength of gravity there?
(b) If the same pair of shoes weighs 0.3 newtons on Pluto (a dwarf planet), what is the
strength of gravity there?
(c) What does the pair of shoes weigh on Earth?
a) 11.5/0.5=23.1N
b) 0.3/0.5=0.6N
c) 0.5x10=5
gravity=mass x weight