Answer:
a) Centripetal force = 80.4 N
b) Tension in the monkey's arm = 167.7 N
Explanation:
The centripetal force is the force keeping the monkey in circular motion and it is given by
F = (mv²/r)
m = mass of the monkey = 8.91 kg
v = velocity of the monkey = 2.61 m/s
r = 75.5 cm = 0.755 m
F = (8.91×2.61²)/0.755
F = 80.4 N
b) At the lowest point, there are 3 forces acting on the monkey, the tension in the arm, the monkey's weight and the centripetal force.
A quick force balance on the monkey at the lowest point gives
F = T - mg
80.4 = T - (8.91×9.8)
T = 80.4 + 87.32
T = 167.72 N
We should really talk about the energy of a photon.
Photon Energy= h x c/ wavelength
where h is Planck's constant and c is the speed of light
h = 6.63 x 10^-34
c =3x 10^8
Energy = 2.37 x 10^-21
Answer:
<u>conduction, convection, </u><u>and </u><u>radiation</u>
Explanation:
when you hold an ice cube, heat is transferred from your warm hand to the cold ice and melts it. Your hand feels cold because it is losing heat energy. There are three ways that heat can be transferred: by conduction, convection, and radiation. heat through solids.
Answer:
B transferred.
Explanation:
The kinetic energy is simply transferred by transforming it into other forms of energy.
According to the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".
- The moving baseball posses kinetic energy
- As it hits the bat, it is converted to mechanical and thermal energy.
- The bat warms up due to the transfer of the kinetic energy.
- The mechanical energy of the bat cause work to be done on it and it breaks apart.
- This ensures that the energy in this process is conserved.
Answer:
Explanation:
Hi!
We define the point (0,0) as the intial position of the ball. The initial velocity is
The motion of the ball in the horizontal direction (x) has constant velocity, because there is no force in that direction. :
In the vertical direction (y), there is the downward acceleration g of gravity:
(note the minus sign of acceleration, because it points in the negative y-direction)
When the ball hits the ground, at t = 65s, y(t = 65 s) = 0. We use this to find the value of the initial vertical velocity:
We used that g = 9.8 m/s²
To find the horizonttal component we use the angle: