Help with multiple choice for physics test

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Homework Help Overview

The original poster is seeking assistance with multiple choice questions from a physics test, specifically referencing a past paper. The subject area appears to involve concepts related to projectile motion, forces, and kinematics.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the optimal angle for projectile range, with one suggesting 45 degrees instead of the original poster's 40 degrees. There are inquiries about the forces acting on an object and the time taken to travel an incline, as well as the components of tension in a circular motion context. The original poster expresses uncertainty about several questions.

Discussion Status

Some participants have provided guidance on how to approach the questions, suggesting the need to draw forces and consider kinematics. However, there is no explicit consensus on the correct answers, and the discussion remains open with various interpretations being explored.

Contextual Notes

The original poster mentions a lack of a memo for the past paper, indicating potential constraints in verifying their answers. There is also a request for answers, which raises questions about the expectations for collaboration in the discussion.

TsAmE
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Homework Statement



Trying to find out correct answers to multiple choice.

Homework Equations



None

The Attempt at a Solution



I have an important physics test coming up and I tried the multiple choice questions from a past paper, but unfortunately there is no memo. Could someone please check/help me with my answers (Question 1 of the attached pdf).

1.1 A (cause 40 degrees optimum angle for longest range)

1.2 Not sure

1.3 A (tension vector to the top left, tension component to the left: centripetal a, mg down)

1.4 Have no idea

1.5 Have no idea
 
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No attachment.
 
Oops I forgot. Here it is
 
Where?
 
Sorry run into slight glitch but its now attached
 

Attachments

1.1) No, 45 degrees is the optimal angle for range. But that does not even matter since the question is asking about time. You need to find an equation for the time in the air.

1.2) Draw the forces to find the acceleration in each case. Then use kinematics to solve the time it takes to travel the length of the incline. Then use the fact that it takes double the time when friction is involved.

1.3) Doesn't the tension (diagonal top left) include the component going straight up and the component going to the center of the circle?

1.4/1.5) Think about what will cause it to tilt and come up with some equations, at least try.
 
Last edited:
Oh ok. Can you give me the answers cause I need to check them to see if I got them right
 
Only if you show your work.
 

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