Answer:
15.07 ksi
Explanation:
Given that:
Pitch (P) = 5 teeth/in
Pressure angle (
) = 20°
Pinion speed (
) = 2000 rev/min
Power (H) = 30 hp
Teeth on gear (
) = 50
Teeth on pinion (
) = 20
Face width (F) = 1 in
Let us first determine the diameter (d) of the pinion.
Diameter (d) = 
=
= 4 in
From the values of Lewis Form Factor Y for ( ) = 20 ; at 20°
Y = 0.321
To find the velocity (V); we use the formula:
V = 2094.40 ft/min
For cut or milled profile; the velocity factor 
can be determined as follows:
= 2.0472
However, there is need to get the value of the tangential load
, in order to achieve that, we have the following expression
Finally, the bending stress is calculated via the formula:
15.07 ksi
∴ The estimate of the bending stress = 15.07 ksi
<u>Answer:</u> The weight of the object is 29.4 N
<u>Explanation:</u>
To calculate the weight of the object, we use the equation:
where,
m = mass of the object = 3 kg
g = acceleration due to gravity = 
Putting values in above equation, we get:
Hence, the weight of the object is 29.4 N
The speed downwards is 7 + (3*9.8)
7+ 29.4 = 36.4 m/s
Answer:
it does show the objects position
Answer:
0.0126°C
Explanation:
Kinetic energy sustain by the block,K.E = 1/2× mass×velocity^2
K.E = 1/2 ×1.3×(4^2)
=1/2 × 1.3× 16 = 1.3 ×8 = 10.4J
The internal energy is 71% of kinetic energy is;
U= 71/100 × 10.4 = 7.38J
But U = m × C × ∆T
Where U is internal energy
m is the mass of iron
C is the heat capacity of iron
∆T is the temperature change
By make ∆T the subject of the formula we have
∆T=U/ m×C
=7.38/ 1.3×452= 0.0126°C
