ur answer is A or also known as
When you push a child on a swing, you are doing work on the child because you are pushing against the force of gravity
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Answer:
2m/s²
Explanation:
Given parameters:
Net force on the car = 2000N
Acceleration = 4m/s²
Unknown:
Acceleration of a car twice the mass = ?
Solution:
Let us first find the mass of the car;
Force = mass x acceleration
Mass =
Mass =
= 500kg
Now,
whose mass is twice that of the car
Mass of the new car = 2 x 500 = 1000kg
So;
Acceleration =
Acceleration =
= 2m/s²
Answer:
The atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus