Humans can hear the squeaks and clicks that bats emit while using echolocation to see their surroundings
2 answers:
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Answer:
+0.231 m/s
Explanation:
The problem can be solved by using the law of conservation of momentum. In fact, we have that the total momentum before the collision must be equal to the total momentum after the collision:
where we have
m1 = 245000 kg is the mass of the first car
m2 = 57500 kg is the mass of the second car
u1 = 0.513 m/s is the initial velocity of the first car
u2 = -0.125 m/s is the initial velocity of the second car
v = ? is the final velocity of the two cars together, after the collision
Solving the equation for v, we find
And the direction (positive sign) is the same as the initial direction of the first car.
Answer:
- the angular velocity in radians per second is 125.7 rad/s
- the centripetal acceleration of the propeller tip under these conditions is 144.5 m/s
- the centripetal acceleration of the propeller tip under these conditions in multiplied of g is 1853 g
Explanation:
given information:
diameter. d = 2.30 --> r = d/2 = 2.3/2 = 1.15 m
angular velocity, ω = 1200 rev/min
- angular velocity in radians per second
ω = 1200 rev/min
= 1200
= 125.7 rad/s
- the linear speed of its tip at this angular velocity
v = ω r
= 125.7 rad/s x 1.15 m
= 144.5 m/s
- the centripetal acceleration
a = ω^2 r, ω =
=
=
=
= 18160
covert to multiplei of g, g= 9.8
a = 18160 /9.8 = 1853 g