The mass of a car is 1000 kg. How much work is required to be done on it to make it move with a

Name: Problem 427, Chapter 4: JEE Physics
Uploaded: 2021-10-03T06:32:34-08:00
Duration: 1 min 42 s
Channel: Narendra Kumar
Description: The mass of a car is 1000 kg. How much work is required to be done on it to make it move with a speed of 36 km / h ? (A) 2.5 ×10^4 J (B) 5 ×10^3 J (C) 500 J (D) 5 ×10^4 J

step 1 Hello, in this problem we have to find the mass of car is 1000 KG and how much work is required

Question

The mass of a car is $1000 \mathrm{~kg}$. How much work is required to be done on it to make it move with a speed of $36 \mathrm{~km} / \mathrm{h}$ ? (A) $2.5 \times 10^{4} \mathrm{~J}$ (B) $5 \times 10^{3} \mathrm{~J}$ (C) $500 \mathrm{~J}$ (D) $5 \times 10^{4} \mathrm{~J}$

   The mass of a car is $1000 \mathrm{~kg}$. How much work is required to be done on it to make it move with a speed of $36 \mathrm{~km} / \mathrm{h}$ ?
(A) $2.5 \times 10^{4} \mathrm{~J}$
(B) $5 \times 10^{3} \mathrm{~J}$
(C) $500 \mathrm{~J}$
(D) $5 \times 10^{4} \mathrm{~J}$

JEE Physics

StemEZ 1st Edition

Chapter 4, Problem 427

Instant Answer

Solved by Expert Narendra Kumar

10/03/2021

Step 1

We do this by multiplying the speed by $\frac{5}{18}$. So, $36 \mathrm{~km/h} = 36 \times \frac{5}{18} = 10 \mathrm{~m/s}$. Show more…

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The mass of a car is $1000 \mathrm{~kg}$. How much work is required to be done on it to make it move with a speed of $36 \mathrm{~km} / \mathrm{h}$ ? (A) $2.5 \times 10^{4} \mathrm{~J}$ (B) $5 \times 10^{3} \mathrm{~J}$ (C) $500 \mathrm{~J}$ (D) $5 \times 10^{4} \mathrm{~J}$

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Key Concepts

Work-Energy Theorem

This principle states that the work done on an object is equal to the change in its kinetic energy. It is a foundational concept in physics, linking the force applied to an object over a distance with the resulting change in its motion.

Kinetic Energy

Kinetic energy is the energy that an object possesses due to its motion, defined mathematically as one-half the product of its mass and the square of its velocity. It is a key concept in mechanics when analyzing the effects of forces on moving bodies.

Unit Conversion

Unit conversion is the process of converting quantities from one set of units to another to ensure consistency in calculations. For instance, converting speed from kilometers per hour to meters per second is essential for applying formulas correctly in physics, as standard SI units are used.

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