**Question :** If a particle covers half the circle of radius 𝑅 with constant speed then

(A) Change in momentum is 𝑚𝑣r

(B) Change in 𝐾. 𝐸. is 1/2 mv^{2}

(C) Change in 𝐾. 𝐸. is mv^{2}

(D) Change in 𝐾. 𝐸. is zero

**Answer :** option (B)

**Solution :**

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**Question :** If a particle covers half the circle of radius 𝑅 with constant speed then

(A) Change in momentum is 𝑚𝑣r

(B) Change in 𝐾. 𝐸. is 1/2 mv^{2}

(C) Change in 𝐾. 𝐸. is mv^{2}

(D) Change in 𝐾. 𝐸. is zero

**Answer :** option (B)

**Solution :**