A student rolls a die 15 times and records the results. This is the first set of data. The same student rolls a different die 15
times and records the results. This is the second set of data.
What is an appropriate conclusion about the shape of the dot plots?
A) The first dot plot is skewed to the right.
B) The second dot plot has more of a "bell-shaped" curve than the first dot plot.
C) The first dot plot has a unimodal distribution and the second dot plot has a uniform distribution.
D) The second dot plot looks to have a trimodal distribution.
What is an appropriate conclusion about the shape of the dot plots?
A) The first dot plot is skewed to the right.
B) The second dot plot has more of a "bell-shaped" curve than the first dot plot.
C) The first dot plot has a unimodal distribution and the second dot plot has a uniform distribution.
D) The second dot plot looks to have a trimodal distribution.
2 answers:
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Step-by-step explanation:
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- Mass of a large rock ( m ) = 4.0 kg
- Velocity ( v ) = 2.0 m/s
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- Momentum ( p )
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plug the known values :
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Imagine that a car and a truck both have the same speed on the road. Which one can stop easily ? Of course , it is hard to stop the truck relative to the car. The reason is that the car and the truck have the same speed bit different masses. Thus , we can say that to stop a heavier body is harder than to stop a lighter one even both of them have the same speed.
If two tennis balls are hit towards you in different velocities , it is not equally easier to stop them. The ball in more velocity is difficult to stop relatively. Thus , we can say that to stop a body in more velocity is harder than to stop a body with less velocity , eventhough they have the same speed.
The physical quantity that describes the quantity of motion of a body is called momentum. The momentum of a moving body or linear momentum is defined as the product of mass & velocity of a moving body.
Mathematically ,
Momentum = mass × velocity
i.e p = m × v
The SI unit of momentum is kg • m/s. Since velocity is a vector quantity and multiplied with mass ( scalar quantity) , momentum becomes a vector quantity. Direction of momentum is the same as velocity.
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