1. If a car's mass is 439 kg, what is the weight on earth?
A. 4390 N
B. 4350 N
C. 4300 N
D. 4360 N
2. If a person weighs 717 N on earth and 5320 N on the surface of a nearby planet, what is the acceleration due to gravity on that planet?
A. 83.6 m/s^2
B. 72.7 m/s^2
C. 63.2 m/s^2
D. 53.1 m/s ^2
Help me please, I'm horrible at physics.
2 answers
Is number 2 B?
1. weight is the mass being "pushed on" by gravity
... w = m g = 439 kg * 9.81 m/s^2
2. weight is proportional to gravitational force (and acceleration)
... Gp / g = Wp / w ... Gp / 9.81 = 5320 / 717
... B is correct
... w = m g = 439 kg * 9.81 m/s^2
2. weight is proportional to gravitational force (and acceleration)
... Gp / g = Wp / w ... Gp / 9.81 = 5320 / 717
... B is correct
2 answers