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Chapter 2: Q8P (page 82)

Question:A system is acted upon by two forces,18,47,-23Nand-20,-13,41N. What is the net force acting on the system?

Short Answer

Expert verified

The net force acting on the system is-2,34,18N

Step by step solution

01

Understanding the definition of the net force

A force is described as a push or pull on an object that occurs due to the interaction of one system with a different system. When two items interact, each of them experiences a force.

02

Calculation for the net force

To calculate the net force acting on this system, combine all forces.

Add both the given forces as

Fnet→F1→+F2→

Substitute the values in the above expression.

F→net=18,47,-23N+-20,-13,41N=-2,34,18N

Therefore, the net force acting on the system is-2,34,18N

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Most popular questions from this chapter

(1) A spring of stiffness 13 N/m, with relaxed length 20 cm, stands vertically on a table as shown in Figure 2.36. Use the usual coordinate system, with +x to the right, +y up, and +z out of the page, towards you. (a) When the spring is compressed to a length of 13 cm, what is the unit vector L^? (b) When the spring is stretched to a length of 24 cm, what is the unit vector L^? (2) A different spring of stiffness 95 N/m, and with relaxed length 15 cm, stands vertically on a table, as shown in Figure 2.36. With your hand you push straight down on the spring until your hand is only 11 cm above the table. Find (a) the vector L^, (b) the magnitude of L^, (c) the unit vector role="math" localid="1668490124469" L^, (d) the stretch s, (e) the forcerole="math" localid="1668490004012" F→ exerted on your hand by the spring.

A runner starts from rest and in3 sreaches a speed of . Assume that her speed changed at a constant rate (constant net force).

(a) What was her average speed during this 3 s interval?

(b) How far did she go in this 3 s interval?

Two metal rods are made of different elements. The interatomic spring stiffness of element A is three times larger than the interatomic spring stiffness for element B. The mass of an atom of element A is three times greater than the mass of an atom of element B. The atomic diameters are approximately the same for A and B. What is the ratio of the speed of sound in rod A to the speed of sound in rod B?

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A proton has mass1.7×10-27 kg. What is the magnitude of the impulse required to increase its speed from 0.990c to 0.994c?
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