How Do You Solve This AS Physics Kinematics Multi-Choice Question?

[seiei]

Homework Statement

All included in image provided. As you can see, it's a multi-choice qu

Homework Equations

Acceleration=Velocity/Time
Not sure what else...

The Attempt at a Solution

Uncertain about how to approach this question. Using SI units I eliminated B. Any help would be appreciated. Thanks :D

 

[cepheid]

Are you aware of a kinematics equation (for constant acceleration) that relates distance traveled to acceleration and time?

 

[seiei]

s=1/2at^2 when the initial velocity=0

 

[PeterO]

Homework Statement

All included in image provided. As you can see, it's a multi-choice qu

Homework Equations

Acceleration=Velocity/Time
Not sure what else...

The Attempt at a Solution

Uncertain about how to approach this question. Using SI units I eliminated B. Any help would be appreciated. Thanks :D

Note that this is a multiple choice question.
You don't have to find the answer, you only have to find which one of these answers is the answer.

Your experience should tell you that an object falling on Earth [approximating g = 10] will fall to 5m in one second and to 20m in 2 seconds - an extra 15m.

This if a = 10, x = 5 and h = 15 then t1 = 1 and t2 = 2.

Substitute those values in and only one of the options will yield the correct answer.

I repeat - to emphasise:

This is a multiple choice question.
You don't have to find the answer, you only have to identify which one of the offered answers is the correct.

Alternately you can work with the equation you identified and derive the solution.

 

[asteriatic]

I would suggest using the equations of motion to solve this question. The equations of motion are a set of mathematical equations that describe the motion of an object under constant acceleration. The three equations are:

1. v = u + at (velocity = initial velocity + acceleration x time)
2. s = ut + 1/2at^2 (displacement = initial velocity x time + 1/2 x acceleration x time^2)
3. v^2 = u^2 + 2as (velocity^2 = initial velocity^2 + 2 x acceleration x displacement)

Using these equations, we can solve for the unknown variables in each scenario and determine the correct answer. It is also important to pay attention to the units of each variable to ensure that they are consistent and in SI units.

For example, in scenario A, we can use the equation v = u + at. We know that the initial velocity (u) is 10 m/s and the acceleration (a) is -2 m/s^2. We also know that the final velocity (v) is 0 m/s, since the object comes to rest. Therefore, we can rearrange the equation to solve for time (t):

v = u + at
0 = 10 + (-2)t
-10 = -2t
t = 5 seconds

This means that the object takes 5 seconds to come to rest. Similarly, we can use the equations to solve for the unknown variables in the other scenarios and determine the correct answer.

In conclusion, using the equations of motion and paying attention to units can help us solve this kinematics question. It is important to have a good understanding of these equations and how to manipulate them to solve for different variables.