We are given:
m1 = 300 grams
m2 = 500 grams
h1 = h2 = 2 meters
We have to determine the potential energy of both toy cars:
PE = mgh
PE1 = m1gh1
PE1 = 300 grams/1000g/kg * 9.81 m/s^2 * 2 meters
PE1 = 5.886 Joules
PE2 = m2gh2
PE2 = 500 grams/1000g/kg * 9.81 m/s^2 * 2 meters
PE2 = 9.81 Joules
PE2 - PE1 / PE2
9.81 - 5.886 Joules / 9.81 joules * 100 = 40.0%
Therefore, the 500-gram car is greater by 40% in terms of potential energy than the 300-gram car. This is because mass is directly proportional to the potential energy of an object.
Answer:
Straining method
Explanation:
Straining method is the method that can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter.
I think it could be D please tell me if I’m wrong I hope you have a wonderful day ❤️
Answer:
Option C, The total momentum of the fragments is equal to the original momentum of the firecracker.
Explanation:
Kinetic energy of cracker cannot remain constant before and after explosion. It is so because in the process of burning and bursting some amount of kinetic energy is lost in the form of light and heat energy. While the total mass before and after the explosion remains constant due to which the momentum is conserved before and after the explosion
Hence, option C is correct
Answer:
v = 1.25 m/s
Explanation:
We have,
Distance covered by a person is 10 meters
Time taken by him to cover that distance is 8 seconds.
If we want to find the speed of a person, we must know distance covered by it and taken. In this case, we know both distance and time. His speed is given by :

So, the speed of the person is 1.25 m/s.