Answer: Its answer C: A wheelbarrow is more difficult to move as More objects are placed inside.
Explanation: The greater the mass of the object the more force is needed to make it move.
Hope this helps!! :)
Answer:
B: Horizontally to the left
Explanation:
Horizontal velocity is always constant throughout the entire trajectory of the rocket and acts in the horizontal direction in which the rocket was launched. This is because gravity only acts in the downwards vertical direction.
So in order words at peak height, horizontal velocity is in the horizontal direction in which the rocket was launched.
So if it was to the left, then direction is left but if right, then direction is right.
Looking at the options, the most appropriate will be:
Horizontally to the left
Answer:
It takes <u>2.93 s</u> for the object to reach ground from the height of 42 m.
Explanation:
Given:
Displacement of the object is, ![d=-42\ m](https://tex.z-dn.net/?f=d%3D-42%5C%20m)
As it is dropped, initial velocity of the object is, ![u=0](https://tex.z-dn.net/?f=u%3D0)
Acceleration of the object is equal to acceleration due to gravity and is equal to, ![a=g=-9.8\ m/s^2](https://tex.z-dn.net/?f=a%3Dg%3D-9.8%5C%20m%2Fs%5E2)
Now, using Newton's equation of motion and plugging in the values, we get:
![d=ut+\frac{1}{2}at^2\\-42=0+\frac{1}{2}(-9.8)t^2\\-42=-4.9t^2\\t^2=\frac{-42}{-4.9}\\t^2=8.571\\t=\sqrt{8.571}=2.93\ s](https://tex.z-dn.net/?f=d%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2%5C%5C-42%3D0%2B%5Cfrac%7B1%7D%7B2%7D%28-9.8%29t%5E2%5C%5C-42%3D-4.9t%5E2%5C%5Ct%5E2%3D%5Cfrac%7B-42%7D%7B-4.9%7D%5C%5Ct%5E2%3D8.571%5C%5Ct%3D%5Csqrt%7B8.571%7D%3D2.93%5C%20s)
So, it takes 2.93 s for the object to reach ground from the height of 42 m.
If you are measuring the rate of water flow, which in other words, the speed of the water flow,
Then you need to divide the water quantity by time
Explanation:
- Speed is the rate of change of distance with time.
Speed = ![\frac{distance}{time}](https://tex.z-dn.net/?f=%5Cfrac%7Bdistance%7D%7Btime%7D)
- Velocity is given as the displacement per unit of time:
Velocity = ![\frac{displacement}{time}](https://tex.z-dn.net/?f=%5Cfrac%7Bdisplacement%7D%7Btime%7D)
Speed and velocity are similar but speed is a scalar quantity while velocity is a vector quantity. Speed has magnitude but does not point towards a specific direction. Velocity shows both magnitude and direction and it is a vector quantity.
- Acceleration is given as the change in velocity with time. It is a vector quantity:
Acceleration = ![\frac{change in velocity}{time}](https://tex.z-dn.net/?f=%5Cfrac%7Bchange%20in%20velocity%7D%7Btime%7D)
- Distance is how far a body moves. It is scalar quantity.
- Time is the duration of an event. It is a scalar quantity.
Learn more:
Vector calculation brainly.com/question/2678571
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