Question
Asked May 2, 2019

A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.37 g coins stacked over the 30.0 cm mark, the stick is found to balance at the 46.3 cm mark. What is the mass of the meter stick?

check_circle

Expert Answer

Step 1

The meter stick is in equilibrium when the 50.0 cm mark (center of mass) is placed on the knife edge. Two coins of mass 5.37 g are placed at the 30.0 cm mark. Then the new equilibrium position is 46.3 cm.

Step 2

According to principle of moments, the net anticlockwise moment about a pivot point is equal to the net clockwise moment about the same point. The moment of force is given by the product of the force and its perpendicular distance from the pivot point.

Step 3

Equate the moments about the new equilibrium position

Here, m1 is the mass of the coins, m2 is the mass of the stick, g is the acceleration due to gravity, r1 is the distance between the new equilibrium...

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Physics

Kinematics

Related Physics Q&A

Find answers to questions asked by student like you

Show more Q&A add
question_answer

Q: The half-life of iodine-131 (131I)(131I), an isotope used in the treatment of thyroid disorders, is ...

A: Write the relation between decay constant to the half life.

question_answer

Q: An aerialist on a high platform holds on to a trapeze attached to a support by an 8.0-m cord. (See t...

A: The figure shows the free body diagram of aerialist on a platform holds on to trapeze. 

question_answer

Q: In the figure, one end of a uniform beam of weight 460 N is hinged to a wall; the other end is suppo...

A: a)The expression for the tension in the wire,

question_answer

Q: A small block is attached to an ideal spring and is moving in SHM on a horizontal frictionless surfa...

A: a)The expression for the angular frequency,

question_answer

Q: 127 CHAPTER 3 tom of the tank when the elevator is (a) stationary, (b) mov- ing up with an upward ac...

A: (i) Consider the figure when water tank is in stationary elevator.Here, h is the height of this liqu...

question_answer

Q: A 60 coil spring has a spring constant of 403 N/m. It is cut into 4 shorter springs, each of which h...

A: The number of turns in the spring = 60The spring constant of the spring = 403N/mThe spring cut into ...

question_answer

Q: Can some one show step by step of how to solve by using the quadratic kinematic and using (Vix) time...

A: The horizontal distance at which the rock is landed = 1 km 1000 m.The angle at which the rocks launc...

question_answer

Q: a box is moved 10 m across a smooth floor by a force making a downward angel with the floor, so that...

A: Work done is,

question_answer

Q: A motorcycle daredevil is attempting to jump across as many buses as possible (see the drawing). The...

A: The bike is making a projectile motion and the horizontal distance travelled by bike is equal to te ...