quiz Flashcards
equilibrium rigid body
sum of f and t = 0
gravitational force between 2 object of masses doubles their distance apart
1/4 F
if the force in figure makes an angle of 40 degrees at 0.5 m away from fulcrum, what is its torque
3.830 N
wheel of car has a magnitude of 60 Nm, 45 cm to loosen the nut
133.3N
a 35 kg child sits at 0.6 m from pivot, how far does 20 kg sits to balance
1.1m
worried about applying too much torque to a bold using wrench
reduce length of wrench
motion of body about internal axis
rotational axis
remains constant regardless of change in gravity
mass
resistance of 2 bodies 80 kg and 200 kg if its gravitational force is 148.28 etc
26.888m
planet with strongest gravitational force
jupiter
minimum escape velocity of earth
11,186 m/s
moon doesn’t fall on earth due to gravity and is balanced with what force
centrifugal force
period of satellite’s revolution around with mercury’s velocity
10851 s
velocity at which an object travels to break free from planet or moon
escape veocity
formula is not equal to square root of 2GM/d
mgh
not true abt torque
same as work
period of planet is proportional to cubes of their average distance from sun
law of harmonies
planets move in elliptical orbits
law of orbits
GPE=0 with reference to surface of earth
surface of earth
GPE=0 beyong earth’s surface
at infinity
earth with an alt of 1000 km, a satellite needs to move at what velocity to stay in orbit
8 km/s
planet has twice its earth’s readius, mass is half, a is
1/8 G
venus neds to orbit if its 0..725 AU from the sun
225 days
moi with mass 2kg with radius 0.8M
1.2 kgm2
correct unit of moi
kgm^2
radius of moi is reduced in half
1/4
true about grav force between two and massive objects
all
