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QJEEM22Phc83c: JEE Main 2022 Physics - Class 11 JEEM22Phc83c Solution: A small toy starts moving from the position of rest under a…

A small toy starts moving from the position of rest under a constant acceleration. If it travels a distance of 10m in t s, the distance travelled by the toy in the next t s will be :

Multiple Choice Options

  • A 10 m
  • B 20 m
  • C 30 m
  • D 40 m

Step-by-Step Verified Solution

A small toy begins to move from a standstill with a constant acceleration. It covers a distance of 10 meters in t seconds. We need to determine the distance the toy will travel in the subsequent t seconds.

First, we know that the initial distance traveled is given by the formula for constant acceleration starting from rest:

12at2=10 m\frac{1}{2} a t^2 = 10 \text{ m}

Next, we calculate the total distance traveled after 2t seconds:

12a(2t)2=12a⋅4t2=2at2\frac{1}{2} a (2t)^2 = \frac{1}{2} a \cdot 4t^2 = 2 a t^2

Since we know from the initial condition that 12at2=10 m\frac{1}{2} a t^2 = 10 \text{ m} , multiplying it by 4 gives

2at2=40 m2 a t^2 = 40 \text{ m}

Thus, the additional distance traveled in the next t seconds is:

Total distance after 2t seconds−Distance already traveled in t seconds\text{Total distance after 2t seconds} - \text{Distance already traveled in t seconds}

=40 m−10 m= 40 \text{ m} - 10 \text{ m}

=30 m= 30 \text{ m}

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