Answer:
a = 156.14 m/s^2
Explanation:
Using the laws of newton:
∑F = ma
where ∑F is the sumatory of forces, m the mass and a the aceleration.
so:
F - = ma
where F is the force from the hockey stick and is the force of friction.
Replacing values, we get:
(30.2N) - (3.5N)= (0.171kg)a
Finally, solving for a:
a = 156.14 m/s^2
Answer:
1/ 485.6 Nm
2/ Clock-wise
3/ 0 and no direction
4/ 1.62 m
Explanation:
1/ Torque is gravity force times the moment arm. Let's g = 9.81m/s2
2/ If person 2 is sitting on the right, the direction of this torque is clock-wise, since the gravity is acting downward.
3/ Assuming that location A is right at the pivot point, then the torque generated by this torque is 0, since the moment arm is 0. This has no direction.
4/ The seasaw is balanced, this means torques generated by 2 people are equal and in opposite direction
So the new location for d2 is 1.62m
Answer:
She throws the wrench in the opposite direction of her destination and the resulting backward force should be enough to get her back to the station.
Answer: Wavespeed (V) = Frequency F x wavelength λ (V = F λ)
Explanation:
The wavespeed is the distance covered by a wave in one second. It is measured in metre per second, and represented by the symbol V. It is directly proportional to the wavelength and frequency
i.e Velocity (V) = Frequency F x wavelength λ
V = F λ
For instance:
Assume wavelength (λ)= 20 m
Frequency = 10 Hz.
To get the wavespeed, use the formula
V = F λ
V = 20 metres x 10 hertz
V = 200 metres per second
Thus, the wave travels at a speed of 200 metres per second