Answer:
the work done by air resistance is 38.5 J
Explanation:
given information:
mass of the ball, m = 0.25 kg
initial speed, = 40 m/s
final speed, = 30 m/s
horizontal distance, x = 120 m
Δh = 20 m
according to conventional energy
W = -
where
is initial energy
is final energy
E = KE + PE
KE is kinetic energy
PE is potential energy
W = -
= mg + - (mg + )
= mg( )+
= m (gΔh + )
= 0.25 ( (9.8) (20) + )
= - 38.5 J
The answer is 16.6. What you do is divide 3 divide by 3 which equals 1 and so you do 50 divide by 3 which equals 16.6
Answer:1.513 rps
Explanation:
Given
Diameter of cylindrical space
When the station rotates it creates centripetal acceleration which is given by
Now it must create the effect of gravity so
and
Thus
Given that,
Bulk modulus
Change in volume
Edge
The volume of the cube at the ocean's surface will be
Where, a = edge
Put the value into the formula
We need to calculate the change in pressure
Using formula of pressure
Put the value into the formula
The pressure increases by for every meter of depth
We need to calculate the depth
Using formula for depth
Hence, The depth is 9.75 m.
Answer: 33.3 m/s^2
Explanation:
Here we need to use the second Newton's law.
F = m*a
Force equals mass times the acceleration.
Here we know that the force is F = 4000 N, and the mass is 120kg, then the acceleration must be:
4000 N = 120kg* a
a = (4000/120) m/s^2 = 33.3 m/s^2