Answer:
The net force acting on the otter along the incline is 13.96 N.
Explanation:
It is given that,
Mass of the otter, m = 2 kg
Distance covered by otter, d = 85 cm = 0.85 m
It takes 0.5 seconds.
We need to find the net force acts on the otter along the incline. If a is the acceleration of the otter. It can be calculated using second equation of motion as :
![d=ut+\dfrac{1}{2}at^2](https://tex.z-dn.net/?f=d%3Dut%2B%5Cdfrac%7B1%7D%7B2%7Dat%5E2)
Here, u = 0 (at rest)
![d=\dfrac{1}{2}at^2](https://tex.z-dn.net/?f=d%3D%5Cdfrac%7B1%7D%7B2%7Dat%5E2)
![a=\dfrac{2d}{t^2}](https://tex.z-dn.net/?f=a%3D%5Cdfrac%7B2d%7D%7Bt%5E2%7D)
![a=\dfrac{2\times 0.85}{0.5^2}](https://tex.z-dn.net/?f=a%3D%5Cdfrac%7B2%5Ctimes%200.85%7D%7B0.5%5E2%7D)
![a=6.8\ m/s^2](https://tex.z-dn.net/?f=a%3D6.8%5C%20m%2Fs%5E2)
The net force acting on the otter along the incline is given by :
F = ma
![F=2\ kg\times 6.8\ m/s^2](https://tex.z-dn.net/?f=F%3D2%5C%20kg%5Ctimes%206.8%5C%20m%2Fs%5E2)
F = 13.6 N
So, the net force acting on the otter along the incline is 13.96 N. Hence, this is the required solution.
Ernest Rutherford
don't know the age sorry
Power is measured in watts
Answer:
7kg
Explanation:
Given parameters:
Force on the rock = 28N
Acceleration = 4m/s²
Unknown:
Mass of the rock = ?
Solution:
According to newton's second law of motion;
Force = mass x acceleration
Insert the given parameters to find the mass;
28 = mass x 4
mass =
= 7kg
Initial speed of the train = 7 m/s
Final speed of the train = 17 m/s
Change of speed of the train = (17 - 7) m/s
= 10 m/s
Time taken for the change of the speed of the train = 120 s
Then
Acceleration of the train = Change of speed of the train/Time taken for the change of speed
= 10/120 m/s^2
= 1/12 m/s^2
= 0.083 m/s^2
So the acceleration of the train is 1/12 meter per second square or 0.083 m/s^2. I hope this is the answer you were looking for.