Physics Midterm Review 2

Front

What is the x-component of a vector given in the form (magnitude, angle)?

Back

The x-component can be calculated using the formula: x = magnitude * cos(angle). For example, for a vector (13 m/s, 55°), the x-component is approximately 7.45 m/s.

Front

What is the difference between distance and displacement?

Back

Distance is a scalar quantity that refers to how much ground an object has covered, regardless of its starting or ending point. Displacement is a vector quantity that refers to the change in position of an object, considering direction.

Front

What is the unit of force in the International System of Units (SI)?

Back

The unit of force is the newton (N), which is equivalent to kg·m/s².

Front

How do you calculate average velocity?

Back

Average velocity is calculated by dividing the total displacement by the total time taken. It can be expressed as: average velocity = (final position - initial position) / (final time - initial time).

Front

If a bicyclist travels at a speed of 18 km/h, how long will it take to travel 4 km?

Back

Time can be calculated using the formula: time = distance / speed. Therefore, time = 4 km / 18 km/h = 0.22 hours.

Front

What is the formula for calculating the y-component of a vector?

Back

The y-component can be calculated using the formula: y = magnitude * sin(angle).

Front

Define scalar quantity and give an example.

Back

A scalar quantity is a physical quantity that has only magnitude and no direction. An example of a scalar quantity is temperature.

Front

Define vector quantity and give an example.

Back

A vector quantity is a physical quantity that has both magnitude and direction. An example of a vector quantity is velocity.

Front

What is the relationship between work, force, and displacement?

Back

Work is defined as the product of the force applied to an object and the displacement of that object in the direction of the force. The formula is: Work = Force × Displacement × cos(θ), where θ is the angle between the force and displacement.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula: KE = 0.5 × mass × velocity².