Answer:
mass
Explanation:
As this is directly related to inertia. Inertia is the property of unit which resists the change of state of rest or motion
Answer:
2.5 m/s²
Explanation:
a = ∆v/∆t = (15 m/s)/(6 s) = (15/6) m/s² = 2.5 m/s²
Answer:
B. Decrease the plane’s speed and height
Explanation:
Decrease in speed of plane:
When the speed of the plane is decreased then initial velocity of the package will be lesser. As a result, final velocity will also be lesser because in this case final velocity depends upon the initial velocity.
Decrease in height:
According to law of conservation of energy:
Loss in potential energy = Gain in Kinetic energy
mgh = ½ mV^2
It means with the decrease in height less potential energy will be converted to kinetic energy. As package has constant mass so it will gain less velocity.
Answer:
The male skater's velocity is 13.71 m/s.
Explanation:
From the law of conservation of momentum:
m1u1 = (m1 + m2)u2
m1 is the mass of the male skater = 78.2 kg
m2 is the mass of the female skater = 48.5 kg
u1 is the velocity of the male skater as a result of the push
u2 is the velocity with which the male skater pushed away the female skater = 8.46 m/s
u1 = [(78.2+48.5)8.46] ÷ 78.2 = 1071.882 ÷ 78.2 = 13.71 m/s
