Practice Problems Confused on what equations to use

AI Thread Summary
The discussion revolves around confusion regarding the appropriate equations to use for solving three physics problems. The first problem involves calculating the angle of banking for a curve with a specified radius and speed, emphasizing the need to consider forces and angles. The second problem requires determining the lift force acting on a gliding airplane, with a focus on balancing forces while moving at constant speed. The third problem entails calculating the acceleration of two blocks connected by a rope, highlighting the importance of drawing diagrams to visualize forces. Participants suggest that understanding the components of forces using sine and cosine functions is crucial for solving these problems.
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Practice Problems! Confused on what equations to use!

Homework Statement



Question 1: Calculate the angle of banking of a curve 200m in radius in order hat traffic moving at 70 km/h may round the curve without depending on friction.

Homework Equations



Don't know



Homework Statement



Question 2: An airplane is gliding in a direction 10 degrees downward from the horizontal. Three forces act upon it: its weight of 10,000N; the lift, perpendicular to the direction of motion; and the drag of air friction, opposite to the direction of motion. Assume the plane moves with constant speed and compute the value of the lift.

Homework Equations



Don't know

Homework Statement



Question 3: A 40kg block is place on a level table and a rope is fastened to it which passes horizontally to a pulley at the edge of the table and thence extends downward to a 1.5kg block suspended from the other end. Neglecting friction, calculate the acceleration and direction of the moving blocks.

Homework Equations



Don't know
 
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The first thing to do for each of them is to draw a diagram showing all the forces.
 


mgb_phys said:
The first thing to do for each of them is to draw a diagram showing all the forces.

Ok. After that what do I do?

I am trying to figure out what equations to use!
 


There are no equations as such, you will just have a bunch of forces and angles - the most you will have to do is work out what the component of the forces are in each direction. All you will need is sin and/or cos.
 

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