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Natasha2012 [34]
3 years ago
9

A ball rolls across the grass. Which of these statements best describes what happens to the particles that make up the ball afte

r the ball stops rolling? The particles do not move. The particles are vibrating. The particles slide past each other. The particles move from place to place.
Physics
1 answer:
Lemur [1.5K]3 years ago
5 0
The particles are vibrating
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If the speedometer of your car reads a constant speedometer of your car reads a constant speed of 40km/hr , can you say the car
Harrizon [31]
I think u can say thats a constant velocity, but remember if ur turning, or going around a curve, that is also changing velocity. Hope this helps have a great day! 
4 0
3 years ago
How much potential energy does a 40-N medicine ball gain when it is lifted 5 m?
777dan777 [17]
We know, Potential Energy = Force * Height
Here, F = 40 N
h = 5 m

Substitute their values, 
U = 40 * 5
U = 200 J

In short, Your Answer would be Option A

Hope this helps!
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3 years ago
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6 0
2 years ago
An airplane awaiting departure is cleared to takeoff, its accelerates down a runway at 3.20m/ s2 for 32.8s until it finally lift
stich3 [128]

The final velocity before takeoff is 104.96 m / s.

<u>Explanation:</u>

The last velocity of a given object over some time defines the final velocity. The final velocity of the object is given by the product of acceleration and time and adding this product to the initial velocity.

To calculate the final velocity,

                          V = u + at

where v represents the final velocity,

           u represents the initial velocity,

           a represents the acceleration

            t represents the time taken.

                            v = 0 + (3.20)\times( 32.8)

                            v   = 104.96 m / s.

7 0
3 years ago
At summer camp, the swimming course runs the length (L) of a small lake. To determine the length of the course, the camp counsel
Oduvanchick [21]

<u>Answer:</u>

<em>The length of the swimming course is 47.16 meters.</em>

<u>Explanation:</u>

It is given that the right triangle overlaps the lake and hypotenuse L runs through the length of the lake. Thus length of the lake will be the length of this hypotenuse.

The instructors have conducted measurements of the right triangle and has found the legs to be 25 and 40 meters. The sum of squares of base and height of  a right triangle gives the value of its hypotenuse according to Pythagoras theorem.

Thus h^2+b^2=H^2

b - base

h - height.

40^2+25^2=1600+625=2225

H=\sqrt{2225}=47.16 m

6 0
3 years ago
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