Centrifugal force is not a real force.
When you move around a curve, there IS a real force pulling you
around the curve. Since your body wants to go straight, it feels as if
there's a force trying to pull you away from the curve. But there isn't.
That feeling of a force is greater when your speed around the curve
is greater, or when the curve is tighter, i.e. smaller radius.
Answer:
2.82 s
Explanation:
The ball will be subject to the acceleration of gravity which can be considered constant. Therefore we can use the equation for uniformly accelerated movement:
Y(t) = Y0 + Vy0 * t + 1/2 * a * t^2
Y0 is the starting position, 2.3 m in this case.
Vy0 is the starting speed, 13 m/s.
a will be the acceleration of gravity, -9.81 m/s^2, negative because it points down.
Y(t) = 2.3 + 13 * t - 1/2 * 9.81 * t^2
It will reach the ground when Y(t) = 0
0 = 2.3 + 13 * t - 1/2 * 9.81 * t^2
-4.9 * t^2 + 13 * t + 2.3 = 0
Solving this equation electronically gives two results:
t1 = 2.82 s
t2 = -0.17 s
We disregard the negative solution. The ball spends 2.82 seconds in the air.
Answer:
a)
b)
c)
Explanation:
From the question we are told that
Magnetic field strength
Distance traveled
Mass
Resistance
Gravitational acceleration
Because of perpendicularity
a)
Generally the direction of the current will be given as
Because it opposes increases of magnetic flux
b)
Generally the equation for induced EMF is mathematically given as
Generally the equation for induced current is mathematically given as
c)
Generally the the equation for force F at terminal speed is mathematically given as
Answer:
The magnitude of the recoil is v = 1.95 m/s
Explanation:
The momentum of bullet
P = m*v
P = 0.0077kg x 860m/s
P = 6.622 kg m/s
Now using the law of conservation of momentum we have,
P1 + P2 = 0
Now solve to V2 to find the velocity of the rifle so:
m1*v1 + m2*v2 = 0
3.4kg*v1 + 6.622 kg m/s = 0
3.4 kg*v1= -6.622 kg m/s
v1 = 6.622/3.4
v1 = 1.95 m/s
Answer:
Neptune and Uranus
Explanation:
Did a quiz on this not to long ago