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A man sharpens his knife as shown in the...

A man sharpens his knife as shown in the figure. Which of the following properties of friction are in use?
(i) Friction helps us to hold objects.
(ii) Friction acts in the opposite direction of motion
(iii) Friction causes the surfaces in contact to wear away
(iv) Friction produces heat energy

A

(i) and (ii) only

B

(i), (iii) and (iv) only

C

(iii) and (iv) only

D

(i), (ii), (iii) and (iv)

Text Solution

Verified by Experts

The correct Answer is:
D
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