SATHEE: Work Power and Energy 3 Question 4

Work Power and Energy 3 Question 4

4. The magnitude of the normal reaction that acts on the block at the point $Q$ is

(a) $7.5 N$

(b) $8.6 N$

(d) $22.5 N$

Show Answer

Answer:

Correct Answer: 4. (a)

Solution:

At point $Q$ , component of weight along $P Q$ (radially outwards) is $m g \cos 60^{\circ}$ or $\frac{m g}{2}$ .

Normal reaction is radially inwards

$\begin{aligned} N - \frac{m g}{2} & = \frac{m v^{2}}{R} \\ or N & = \frac{m g}{2} + \frac{m v^{2}}{R} \\ = \frac{1 \times 10}{2} + \frac{1 \times (10)^{2}}{40} = 7.5 N \end{aligned}$

Work Power and Energy 3 Question 4

4. The magnitude of the normal reaction that acts on the block at the point $Q$ is

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Work Power and Energy 3 Question 4

4. The magnitude of the normal reaction that acts on the block at the point Q is

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Menu

4. The magnitude of the normal reaction that acts on the block at the point $Q$ is