You are here
Question · Revise, Reflect, Refine, Q3, page 112
Two blocks P and Q on a smooth horizontal surface are shown in Fig. 6.36a and Fig. 6.36b. Two forces of magnitudes 4 N and 5 N are acting in opposite directions on block P, while block Q is moving with a constant velocity. Which of the following statement is correct? (i) P experiences a net force and Q does not experience a net force. (ii) P does not experience a net force and Q experiences a net force. (iii) Both P and Q experience a net force. (iv) Neither P nor Q experiences a net force.
![Question 3 — Two blocks P and Q - How Forces Affect Moti - [Teachoo] - Questions at the end of the chapter](https://cdn.teachoo.com/fb19476a-149d-4e0a-bb1e-f9e08574a3ec/animation-for-two-blocks-p-and-q-on-a-smooth-horizontal-surface-are-shown-in-fig.-6.36a-and-fig.-6.36b.-two-forces-of-m.gif)
Show answer
Answer
- On P, the forces are 5 N and 4 N in opposite directions.
- They are unequal, so they are unbalanced.
- Net force on P = 5 N − 4 N = 1 N
- Q is moving with a constant velocity, so its velocity is not changing.
- No net force acts on Q.
- Answer: (i)
