Answer:
Explanation:
Speed of an object is defined as the ratio of the distance covered by the object to the time taken to cover that distance.
Let be the speed of the object.
Let be the distance travelled by the object.
Let be the time taken by the object.
So,
s=
So,the speed of the car is
Non-renewable energy comes from sources that will run out or will not be replenished in our lifetimes—or even in many, many lifetimes. Most non-renewable energy sources are fossil fuels: coal, petroleum, and <u>natural gas.</u>
<u>Answer:</u> B. natural gas
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↪⭐〽Electrons are the smallest in the mass than all other particles .
Answer:
I'm pretty sure it's the third one where velocity goes from positive to negative
Explanation:
the positive velocity is before the object hits the ground and the negative is after
Answer:
4.04m
Explanation:
First you calculate the velocity of the block when it leaves the spring. You calculate this velocity by taking into account that the potential energy of the spring equals the kinetic energy of the block, that is:
To find the distance in which the block stops you use the following expression (net work done by the friction force is equal to the difference in the kinetic energy of the block):
where Ff is the friction force. By replacing the values of the parameters you obtain:
hence, the distance to the original position is 3.96m+0.08m=4.04m