Question

The position vector of a particle is determined
by the expression 1 = 3tî +4t?j+7. The
distance traversed in first 10 sec is​

Answer 1

Answer:

r(i)=Initial position vector

r(f)=Final position vector

Since r is the fiction to time.

r(i)=r(0)=7

k

r(f)=r(0)=3×10

2

i

+4×(10)

2

j

+7

k

Now,

Displacement vector =r(f)−r(i)

D=

∣

∣

∣

∣

300

i

+400

j

+(7−7)

k

∣

∣

∣

∣

=

300

2

+400

2

=500

Hence, Option A is correct.

Explanation:

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