Answer:
420 Joules
Explanation:
Applying,
W = Fd.................. Equation 1
Where W = Work done by the car, F = Force applied on the car, d = distance.
From the question,
Given: F = 200 N, d = 2.1 m
Substitute these values into equation 1
W = 200×2.1
W = 420 Joules
Hence the work done on the car is 420 Joules
The kinetic energy of the bullet is 20.4 kJ.
<u>Explanation:</u>
Kinetic energy of a bullet will be equal to the product of mass of the bullet with the square of velocity or speed of the bullet and then the half of that product value.
But here the mass of the bullet is not given, instead the weight of the bullet is given in terms of force. So from this, we have to first find the mass of the bullet.
We know that as per Newton's second law of motion, force is directly proportional to the product of mass and acceleration. So here the acceleration will be equal to the acceleration due to gravity as it is weight of the object.
So F = mg
0.10 N = m × 9.8
So ,the mass of the bullet is 0.0102 kg.
Now, we know the mass and velocity of the bullet is given as 2000 m/s.
So,
kinetic energy = × m × v²
kinetic energy = 0.5 × 0.0102 × 2000 × 2000 = 20.4 kJ
Thus, the kinetic energy of the bullet is 20.4 kJ.
Accurately
Explanation:
If we took our laboratory spring to the moon, we can accurately measure the mass because mass of any substance is the same every where in the universe.
Mass is the amount of substance in a matter. Since the same substance on earth is made up of same matter on moon, the mass will remain the same.
- The only difference between the measurement would be the weight.
- Weight is the vertical force on an object.
- It is function of mass and acceleration due to gravity.
Weight = mass x acceleration due to gravity.
- Acceleration due to gravity on earth and moon are different.
- The gravity on moon is about one-sixth that on earth.
- The weight using the same mass will be one-sixth
- But the mass will be the same.
learn more:
Weight and mass brainly.com/question/5956881
#learnwithBrainly
Answer: atoms that are attracted to each other because the bonds that form between them can support the creation of the structure
Explanation:
<u>Answer</u>
9 m
<u>Explanation</u>
The energy stored in a spring is given by:
Energy = 1/2 k²e
Where e is the compression and k is the spring constant.
Energy = 1/2 × 176,400 × 0.2²
= 3,528 N
The same energy will then be converted to potential energy given by:
Energy = mgh
Where m is the mass, g is the gravity and h is the height above the ground.
Energy = mgh
3,528 = 40 × 9.8 × h
3,528 = 392h
h = 9 m