Abeka 9th Science L18 Quiz 4

What is the study of motion and forces?

• Chemistry
• Kinematics

• Dynamics

• Mechanics

What is the sum of two or more vectors called?

• Vector direction
• Resultant

• Magnitude

• Scalar quantity

A communications satellite is directly overhead at 9pm. After being tracked for one day, the satellite was detected at the same spot overhead at 9pm. Its orbit radius was measured to be 42,200km and the circumference was 265,000km. What is the magnitude of the satellite's total displacement relative to Earth's center?

• 0 km

• 84,400 km

• 42,200 km

• 265,000 km

What is the distance traveled by an object per unit of time?

• Speed
• Momentum
• Acceleration
• Velocity

A truck driver making a delivery drove 10.0 km west and 4.3 km south. Which of the following equations could be used to find the magnitude of his total displacement?

• c² = a² + b²

What is the average velocity of a car that travels 48 km north in 2.0h?

• 48 km/h east
• 24 km/h north
• 30 km/h north
• 20 km/h south

What is the total displacement of an airplane that travels 1000. km west and then travels 600. km east?

• 600 km west
• 1000 km east
• 400 km east
• 400 km west

What branch of physics addresses the effects of forces on matter?

• Mechanics
• Quantum Vectors

• Electromagnetism
• Thermodynamics

What type of mathematical quantity, often represented by arrows, has both magnitude and direction?

• Scalar
• Matrix
• Point
• Vector

What term refers to the branches of physics discovered before 1900?

• Thermodynamics
• Relativistic Physics
• Quantum Physics
• Classical Physics