While sliding down a hill in a sled, the force of gravity causes the sled to accelerate down the hill. The force of friction eventually causes the sled to stop. the friction force partly cancels some of the gravity force pulling the sled down. These two forces affect many motions on Earth.
Answer:
True
Explanation:
The term 'plyometrics' is used interchangeably with the term 'jump training'. The technique can be used for training in sports that require explosive movements.
Answer:
Direction of the electric force acting on the proton after it enters the electric field is along the positive y-axis.
Explanation:
In an electrical field electrical field lines goes from positive to negative. Therefore, electrical force vector is on exactly the same way with electrical field lines for a proton. Which means if the electrical field directed along the positive y-axis, electrical force for proton will be on the same way.
Boyle's law is a gas law which states that pressure and volume of a gas are inversely proportion to each other when temperature is kept constant.
Answer:
![L' = 104.6\ m](https://tex.z-dn.net/?f=L%27%20%3D%20104.6%5C%20m)
Explanation:
given,
speed of length of travel = 0.86 c
length of tunnel = 88 m
Assume length of super train = 205 m
An observer at rest in the tunnel's reference frame will observe the train's length to be contracted:
L' = L₀ / γ
L' is the length the observer measures,
L₀ is the proper length of the train
![\gamma = \dfrac{1}{\sqrt{1-\dfrac{v^2}{c^2}}}](https://tex.z-dn.net/?f=%5Cgamma%20%3D%20%5Cdfrac%7B1%7D%7B%5Csqrt%7B1-%5Cdfrac%7Bv%5E2%7D%7Bc%5E2%7D%7D%7D)
![L' = L_0\sqrt{1-\dfrac{v^2}{c^2}}](https://tex.z-dn.net/?f=L%27%20%3D%20L_0%5Csqrt%7B1-%5Cdfrac%7Bv%5E2%7D%7Bc%5E2%7D%7D)
![L' = L_0\sqrt{1-\dfrac{(0.86c)^2}{c^2}}](https://tex.z-dn.net/?f=L%27%20%3D%20L_0%5Csqrt%7B1-%5Cdfrac%7B%280.86c%29%5E2%7D%7Bc%5E2%7D%7D)
![L' = 205\times \sqrt{1-0.7396}](https://tex.z-dn.net/?f=L%27%20%3D%20205%5Ctimes%20%5Csqrt%7B1-0.7396%7D)
![L' = 205\times \sqrt{0.2604}](https://tex.z-dn.net/?f=L%27%20%3D%20205%5Ctimes%20%5Csqrt%7B0.2604%7D)
![L' = 205\times 0.5103](https://tex.z-dn.net/?f=L%27%20%3D%20205%5Ctimes%200.5103)
![L' = 104.6\ m](https://tex.z-dn.net/?f=L%27%20%3D%20104.6%5C%20m)