Answer:
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Answer:
17 N
Explanation:
Constant velocity means acceleration is 0.
If acceleration is 0, then the net force is 0. Which means the i components add up to 0, the j components add up to 0, and the k components add up to 0.
0 = 2.0 N − 8.0 N + Fi
Fi = 6.0 N
0 = 4.0 N + 9.0 N + Fj
Fj = -13 N
0 = -2.0 N − 8.0 N + Fk
Fk = 10. N
The magnitude of the force is:
F² = Fi² + Fj² + Fk²
F² = (6.0 N)² + (-13 N)² + (10. N)²
F = √305 N
F ≈ 17 N
Answer:
3.3 mm
Explanation:
The electric shaver is vibrating back and forward covering a distance of 2 mm, therefore, the amplitude of this vibration is always the half of the distance.
So the expression to use is:
A = D/2
A = 6.6 / 2 = 3.3 mm
Now, suppose you want the speed of this vibration:
V = 2πfA
V = 2π * 235 * 0.0033
V = 4.87 m/s
Answer:
The value is
Explanation:
From the question we are told that
The maximum acceleration is
The maximum velocity is
The height of the observatory floor is
Generally at the initial state of the motion the elevator accelerates from rest with a maximum acceleration to attain a maximum velocity at a time period of
Then it continues with the maximum velocity for a time period of
and finally decelerates with a maximum deceleration to come to rest at a time period of
Generally the velocity of the elevator for the first part of the motion is
given that it started from rest u = 0 m/s
=>
=>
Generally from kinematic equations the distance covered during the first part of the motion is
=>
=>
Generally the distance covered during the second part of the elevators motion is mathematically represented as
Generally given that the first part of the elevator motion is similar to the third part of the elevator motion it implies that the distance covered is similar
i.e
The total distance covered is mathematically repented as
=>
=>
Generally the minimum total time taken is
Generally
So
=>
Answer:
Explanation:
The centripetal acceleration is:
The acceleration on this axis is g and the y' is the distance above the ground so solve to t'
Now the distance and the time take the ball lands, can find the speed using
So finally the centripetal acceleration is