How would you calculated the distance travelled by the car using its velocity-time graph
1 answer:
Answer:
Measure the area under the graph.
Explanation:
To calculate the distance traveled by a car (or anything) using a velocity-time graph, just measure the area under the graph! This is super easy. :)
I will use the graph below as an example. If you needed to find the distance traveled from 4 seconds to 10 seconds, you would just find the area under those two points. The dark blue is the area we need to find the area of.
The area of a rectangle is a A = bh
A = bh
A = (6 s)(8 m/s)
A = 48 meters
If you wanted to find the area from 0 seconds to 4 seconds, you would find the area of the light blue triangle.
A = 1/2bh
A = 1/2(4 s)(8 m/s)
A = 16 meters
If you wanted to find the area from 0 seconds to 10 seconds, you would just add these two areas!
A1 + A2
48 meters + 16 meters = 64 meters
I really hope this helped! :)
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<h2><u>KINETIC ENERGY</u></h2><h3>Problem:</h3>
» A 2kg mass is moving at 3m/s. What is its kinetic energy?
<h3>Answer:</h3>
— — — — — — — — — —
<h3>Formula:</h3>To calculate the velocity of a kinetic energy, we can use formula
where,
- v is the velocity in m/s
- KE is the kinetic energy in J (joules)
- m is the mass in kg
— — —
Based on the problem, the givens are:
- KE (Kinetic energy) = ? (unknown)
- m (mass) = 2 kg
- v (velocity) = 3 m/s
To get the velocity, substitute the givens in the formula above then solve.
Therefore, the kinetic energy is 9 Joules.