Uniformly Accelerated Motion

What is the formula to calculate acceleration?

• acceleration = final velocity / time

• acceleration = (final velocity - initial velocity) / time

• acceleration = (final velocity * initial velocity) / time

• acceleration = (final velocity + initial velocity) / time

Define uniformly accelerated motion.

• Motion of an object with no acceleration

• Motion of an object with random acceleration

• Motion of an object with deceleration

• Motion of an object moving in a straight line with constant acceleration.

How is velocity related to acceleration in uniformly accelerated motion?

• Velocity and acceleration are inversely proportional in uniformly accelerated motion.

• Velocity and acceleration have a sinusoidal relationship in uniformly accelerated motion.

• Velocity and acceleration are directly proportional in uniformly accelerated motion.

• Velocity and acceleration are not related in uniformly accelerated motion.

State the equation of motion for uniformly accelerated motion.

• s = ut + at^2

• s = ut + (1/2)at

• s = vt + (1/2)at^2

• s = ut + (1/2)at^2

What is the SI unit of acceleration?

• m/s^2

• km/h^2

• m/s

• cm/s^2

Explain the concept of free fall in the context of uniformly accelerated motion.

• Free fall in the context of uniformly accelerated motion refers to the motion of an object falling solely under the influence of gravity, experiencing a constant acceleration of approximately 9.81 m/s^2.

• Free fall occurs only in a vacuum environment.

• Free fall is when an object moves upwards due to gravity.

• Free fall involves a variable acceleration depending on the object's mass.

How does air resistance affect the motion of an object in free fall?

• Air resistance has no effect on the motion of an object in free fall

• Air resistance increases the speed of the object in free fall

• Air resistance causes the object in free fall to move in a straight line

• Air resistance slows down the object in free fall, eventually reaching a terminal velocity where the forces balance out.

What is the difference between velocity and speed in uniformly accelerated motion?

• Velocity and speed are interchangeable terms in uniformly accelerated motion.

• Velocity includes both speed and direction, while speed only represents the magnitude of motion in uniformly accelerated motion.

• Velocity is the scalar quantity in uniformly accelerated motion, while speed is the vector quantity.

• Speed includes both speed and direction, while velocity only represents the magnitude of motion in uniformly accelerated motion.

Describe the graphical representation of velocity-time graph for uniformly accelerated motion.

• The velocity-time graph is a parabola

• The velocity-time graph is a zigzag pattern

• The velocity-time graph for uniformly accelerated motion is a straight line sloping upwards.

• The velocity-time graph is a horizontal line

Calculate the acceleration of a car that goes from 20 m/s to 50 m/s in 5 seconds.

• 10 m/s^2

• 15 m/s^2

• 25 m/s^2

• 6 m/s^2