SOAL LATIHAN FISIKA SAT TOPIK VEKTOR
Which of the following lists only vector quantities?
Energy, mass, and force
Energy, mass, and power
Velocity, force, and acceleration
Velocity, power, and acceleration
Which pair includes a vector quantity and a scalar quantity?
Displacement, magnetic flux density
Voltage, frequency
Torque, work
Spring constant, electric potential
What is the magnitude of the resultant force of the following system of coplanar forces?
4,62 N
12,3 N
14,5 N
20,0 N
40,0 N
A string of negligible mass with a weight of 50 N at one end is attached at the other end to a fixed point P. the sphere is acted upon horizontal force of 80 N such that string makes an angle to the vertical. What is the value of ?
Which of the following quantity is a vector
Kinetic energy
Temperature
Weight
Speed
A picture weighing 10,0 N hangs freely by a cord XYZ as shown in the diagram below. What is the tension T in the cord
2,9 N
5,0 N
5,8 N
8,7 N
10,0 N
An object of mass 4,9 kg is on a horizontal frictionless surface. It is held in equilibrium by three horizontal strings with different tensions as shown below. The diagram is not drawn to scale. What is the value of the tension, T?
5,2 N
9,8 N
10,7 N
26 N
10,0 N
ABC is an equilateral triangle. Forces of 20 N act along AB, BC, and AC in the directions indicated by the order of the letters. Find magnitude of the resultant and the angle it makes with AB
5 N and 30°
5 N and 60°
10 N and 30°
40 N and 60°
20 N and 60°
Sumber: Soal – soal Salim Sabtu
Pembahasan:
Besaran vektor adalah besaran yang memiliki nilai dan arah. Dari pilihan pilihan tersebut, dapat kita simpulkan yang termasuk besaran vektor adalah kecepatan ( velocity), gaya ( force), dan percepatan ( acceleration)
Di soal ini, kita diminta untuk menentukan pasangan besaran manakah yang termasuk pasangan besaran vektor dan skalar. Dari pilihan tersebut, dapat kita tentukan bahwa yang termasuk pasangan besaran vektor dan skalar adalah torsi (torque), dan usaha (work).
Di soal ini, kita diminta untuk menentukan besaran manakah yang merupakan besaran vektor. Dari besaran besaran tersebut, dapat ditentukan bahwa berat (weight) termasuk ke besaran vektor. Berat merupakan salah satu jenis gaya yaitu gaya berat. Gaya sendiri termasuk ke besaran vektor.
Kasus vektor di atas dapat kita gambarkan menjadi sebagai berikut