Swinging needs to be the first skill mastered
Answer:
Weight of the object will be 195.6 N
Explanation:
We have given mass of the object m = 20 kg
And acceleration due to gravity at any location is given
We have to find the weight of the object in N at the location where value of acceleration due to gravity is
Weight of the object is given by W = mg , here W is weight , m is mass and g is acceleration due to gravity
So weight W = 20×9.78 = 195.6 N
So weight of the object will be 195.6 N
Answer:
B.the same as Lily's.
Explanation:
When a disc is rotating on its axis uniformly with some angular velocity , every particle on it rotates with the same angular velocity , because every particle on it completes a rotation simultaneously . So in one rotation they take same time . Hence particles whether on the outer edge or near the axis , all have same angular velocity .
They but differ due to their different linear velocity . Linear velocity of particle near outer edge have greater magnitude. .
Answer:
total mass is 1095.096 kg
Explanation:
given data
thrust = 67000 N
impulse time t = 285 sec
mass fraction = 0.92
to find out
total mass of the vehicle
solution
we know here thrust formula that is
thrust = m × g × t
put here value and find m
m = 67000 / 9.8(285)
m = 23.988 kg/s
so here mass fraction is express as
mass fraction = m × time / (m × time + mf)
put here time after 42 sec
0.92 = 23.988 × 42 / (23.988 × 42 + mf)
(23.988 × 42 + mf) 0.92 = 23.988 × 42
mf = 87.60 kg
total mass = mf + m × time
put here value
total mass = 87.60 + 23.988 × 42
total mass is 1095.096 kg