Answer:
13.33m/s
Explanation:
Given data
m1= 2000kg
u1= 20m/s
m2= 1500kg
u2= 0m/s
v1= 10m/s
Required
The speed of the sticks
We know that from the expression for the conservation of momentum
m1u1+m2u2= m1v1+m2v2
2000*20+1500*0=2000*10+1500*v2
40000=20000+1500v2
collect like terms
40000-20000= 1500v2
20000= 1500v2
v2= 20000/1500
v2= 13.33 m/s
Hence the velocity of the sticks is 13.33m/s
Answer:
Photoelectric-type alarms aim a light source into a sensing chamber at an angle away from the sensor. Smoke enters the chamber, reflecting light onto the light sensor; triggering the alarm.
Explanation:
nfpa.org is the website with theanswer
Answer:
The mercury in the barometer will go down as there is less air pressing down on the bulb of the barometer to push mercury up.
Explanation:
Answer:
B )-14000N
Explanation:
F=mv-mu
t
F =<u>2</u><u>5</u><u>5</u><u>0</u><u>(</u><u>0</u><u>)</u><u>-</u><u>2</u><u>5</u><u>5</u><u>0</u><u>(</u><u>6</u><u>)</u>
1.1
F = -13909.09
approximately -14000N
Answer:
0.17
Explanation:
Draw a free body diagram. There are five forces on the box:
Weight force mg pulling down
Normal force Fn pushing up
Applied force 52 N pulling to the left
Applied force 125 N pulling to the right
Friction force Fnμ pulling to the left
Sum of the forces in the y direction:
∑F = ma
Fn − mg = 0
Fn = mg
Fn = (45)(9.8)
Fn = 441
Sum of the forces in the x direction:
∑F = ma
125 − 52 − Fnμ = 0
Fnμ = 73
μ = 73 / Fn
μ = 73 / 441
μ = 0.17
