16 Questions
What are the equations of motion for an object moving at uniform acceleration?
s = ( u+v )t / 2, v = u + at, s = ut + at^2 / 2, v^2 = u^2 + 2as
How can you approach questions that require the use of the equations of motion?
Write out the known values and the ones you want to find out in order to choose the correct formula more easily.
What are the known and unknown values in the example of a stone being dropped from a bridge?
Known: u = 0 m/s, s = 50 m, a = 9.81 m/s^2. Unknown: v and t.
How do you find the final velocity (v) of the stone in the example?
v = 31.3 m/s
What is the time (t) for which the stone falls in the example?
t = 3.19 s
Why is it assumed that the initial velocity of the stone in the example is zero?
Because the stone is dropped from rest.
What is displacement?
The overall distance travelled from the starting position, including a direction.
Define instantaneous velocity.
The velocity of an object at a specific point in time.
What does the area under an acceleration-time graph represent?
The change in velocity.
Explain the difference between distance and displacement.
Distance is a scalar quantity describing the amount of ground covered, while displacement includes a direction and is a vector quantity.
What is the gradient of a velocity-time graph?
Acceleration.
What does the area under a velocity-time graph represent?
Displacement.
Explain the concept of uniform acceleration.
Uniform acceleration is where the acceleration of an object is constant.
What is the difference between average velocity and instantaneous velocity?
Average velocity is the velocity of an object over a specified time frame, whereas instantaneous velocity is the velocity of an object at a specific point in time.
What quantities are described as vectors?
Displacement, velocity, force/weight, acceleration.
What is meant by resolving a vector?
Resolving a vector is where you split it into two parts which are perpendicular to each other, its vertical and horizontal components.
Test your understanding of the equations of motion in mechanics with this quiz based on the Edexcel IAL Physics A-level Topic 1.3. Explore how displacement, initial and final velocities, acceleration, and time are related in various scenarios.
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