Author: admin
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Why does mass remain the same but weight changes on different planets?
The mass of an object is the measure of its contents but weight is the force due to gravity. And, the force due to gravity changes on different planets. We know, that on earth g = 9.8 m/s2 And on moon its, g = 1.6 m/s2 Let’s understand this by an example: Example: 1. Calculate…
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Difference between mass and weight
Weight is the force due to gravity on a mass. So, mass remains constant but weight changes according to the change in the gravitational field. W = mg or m = W/g Solved Examples 1. Calculate the mass of a body if the density and volume of a body are 2 Kg/m3 and 5 m3.…
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Difference Between Mass and Weight
Mass is a quantity that gives an idea about how much matter is present in an object. It is a quantitative measure of inertia. And acceleration is inversely proportional to inertia. The relation between force and mass is given by: F = ma or m = F/a The relation between density, mass, and volume is…
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More Examples on Average Speed
Rahul runs 4 miles from his house to the playground in 2 hours every day. What is his average speed? Ans: Average Speed = total distance ÷ total time Average Speed = 4 miles ÷ 2 hours Average Speed = 2 miles per hour Rahul runs 4 miles from his house to the playground in 2…
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Solved Examples on Average Speed
A train travels at a speed of 300 km/hr for 2 hours and then slows down to 220 km/hr for the next 2 hours. What is the average speed of the train? Solution: Distance covered in the first 2 hours, D1 = 300 * 2 = 600 miles Distance covered in the next 2 hours,…
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What is Average Speed?
The average speed of an object can be defined as the total distance travelled by it in a particular interval of time. It can be calculated by dividing the total distance travelled by the total time taken. If an object covers different distances with different velocities, then average velocity of the object is a single…
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Average Speed Formula
Average speed is a crucial factor to learn the time it takes to complete a journey. Average speed is essentially a mechanism that helps us calculate the rate of travel time and distance. It is evident that the speed keeps on changing in the journey, making finding the average speed more important. There are several…
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Average Acceleration – Definition
The change in velocity divided by the elapsed time is the average acceleration. For example, if a marble’s velocity increases from 0 to 60 cm/s in three seconds, its average acceleration is 20 cm/s. This indicates that every second, the marble’s velocity will rise by 20 cm/s. Acceleration for an object is defined as the…