1.
What do you mean by a unit?
2.
unit or a derived unit.
are the fundamental units used in physics?
al Bureau of Weights and Me
Answer:
1)the unit of work is joule. 2)it is derived unit because it is made by two different unit force and displacement .3)
surface?
(1) 51.0 s (3) 10.1 s
(2) 25.5 s (4) 7.14 s
The time required for an object starting from rest to fall freely 500. meters near Earth’s is 10.1 s
Without air resistance Distance = 1/2 g T²
500 m = (1/2) (9.8 m/s²) (T²)
500 m = (4.9 m/s²) (T²)
Divide each side by (4.9 m/s²)
T² = (500 m) / (4.9 m/s²)
= 102.04 s²
T = √ (102.04 s²)
T = 10.1 seconds
To learn more about how to Calculate Distance refer:brainly.com/question/661229
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The clay must be 300 m/s fast in other to stop the car.
For the car to stop, The momentum of the car must be equal to the momentum of the clay.
Formula:
Where:
Make v the subject of the equation.
From the question,
Given:
Substitute these values into equation 2
Hence, The clay must be 300 m/s fast in other to stop the car.
Learn more about momentum here: brainly.com/question/7973509
To stop the car rolling at 2.0 m/s with a blob of clay, you should fire the blob of clay at a speed of 300 m/s. This is based on the principle of conservation of momentum.
The question involves a principle of Physics called the law of conservation of momentum. The law states that the total momentum of a system remains constant if no external forces act on it. Here, the car and the clay are the two objects in the system.
At the start, only the car has momentum, which can be calculated with the equation: momentum = mass x velocity => momentum of car = 1500 kg x 2 m/s = 3000 kg m/s.
After the clay is fired at the car, the total momentum of the system (car + clay) still remains 3000 kg m/s, but now the momentum is shared between them. We want to stop the car, so it will now have no momentum, meaning all momentum must be with the clay.
The equation again turns to momentum = mass x velocity => velocity = momentum/mass => velocity of clay = 3000 kg m/s / 10 kg = 300 m/s.
You should fire the clay at 300 m/s to stop the car.
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