Exploring Motion in Physics

What is the formula for calculating displacement in one dimension?

• Δx = x_final - x_initial

• Δx = x_final * x_initial

• Δx = x_final + x_initial

• Δx = x_initial - x_final

Define velocity and how it differs from speed.

• Velocity is the same as speed but measured in kilometers per hour.

• Velocity measures distance over time, while speed measures time over distance.

• Speed is a vector quantity that includes direction, while velocity is a scalar quantity.

• Velocity is a vector quantity that includes direction, while speed is a scalar quantity that only measures magnitude.

A car travels 100 meters in 5 seconds. What is its average speed?

• 30 meters per second

• 25 meters per second

• 20 meters per second

• 15 meters per second

Explain the concept of acceleration in one dimension.

• Acceleration is the rate of change of velocity in one dimension.

• Acceleration is the speed of an object at a given moment.

• Acceleration is the total force acting on an object.

• Acceleration is the distance traveled in one dimension.

What is the significance of the slope in a distance-time graph?

• The slope indicates the speed of the object.

• The slope shows the direction of the object.

• The slope represents the distance traveled.

• The slope indicates the time taken for the journey.

Describe the motion of an object in two dimensions using vectors.

• Two-dimensional motion can be represented solely by a single scalar value.

• The motion of an object in two dimensions is only described by its speed.

• The motion of an object in two dimensions does not involve any vectors.

• The motion of an object in two dimensions can be described using position, velocity, and acceleration vectors in a coordinate system.

How do you calculate the resultant displacement of two perpendicular vectors?

• R = ab

• R = √(a² + b²)

• R = a - b

• R = a + b

What are the key characteristics of projectile motion?

• No influence from gravity

• Curved trajectory, two-dimensional motion, influenced by gravity, uniform horizontal motion, uniformly accelerated vertical motion.

• Straight line trajectory

• Three-dimensional motion

If a ball is thrown horizontally from a height, what factors affect its time of flight?

• The angle of the throw and air resistance.

• The mass of the ball and the color of the ball.

• The speed of the throw and the surface it lands on.

• The initial height and acceleration due to gravity.

Explain the concept of uniform circular motion and its characteristics.

• In uniform circular motion, the object experiences no acceleration.

• Uniform circular motion is the motion of an object moving at a constant speed in a circular path, characterized by constant speed, changing velocity, centripetal acceleration, and a net inward force.

• Uniform circular motion requires an external force acting outward.

• Uniform circular motion involves changing speed in a straight line.