Newton's Laws of Motion Question

In summary, the conversation involves someone seeking help in solving a problem involving a race car with a weight of 8820 N and a parachute opening at the end of a quarter-mile run. The person shares their attempt at solving the problem using the equation Vsquared=Vosquared + 2ad, but realizes they made a mistake by forgetting the negative sign. They express their appreciation for the assistance.
  • #1
Lelex
2
0
okay, so I've tried this problem and I keep getting it wrong. I would really appreciate some help in solving it. Here is the question:


The parachute on a race car of weight 8820 N opens at the end of a quarter-mile run when the car is traveling at 35 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1000m?


I know there is probably some really simple equation to solve it but I just can't seem to get it. What i tried was using the equation Vsquared=Vosquared + 2ad

I got 0=35squared + 2a(1000), a=.6125 and then plugged that into F=ma to get F=900(.6125)=551.25

I am I even on the right track with this? Please help!
 
Physics news on Phys.org
  • #2
Looks fine to me.
 
  • #3
Thanks for looking. I found out the reason I kept getting it wrong was that I forgot the negative sign. It's the silly mistakes that do you in.
 

FAQ: Newton's Laws of Motion Question

1. What are Newton's Laws of Motion?

Newton's Laws of Motion are three fundamental principles that describe the behavior of objects in motion. They were developed by Sir Isaac Newton in the late 17th century and are the basis for classical mechanics.

2. What is the First Law of Motion?

The First Law of Motion, also known as the Law of Inertia, states that an object at rest will remain at rest and an object in motion will continue in a straight line at a constant speed unless acted upon by an external force.

3. What is the Second Law of Motion?

The Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. This means that the greater the force applied to an object, the greater its acceleration will be, and the more massive the object, the less it will accelerate.

4. What is the Third Law of Motion?

The Third Law of Motion, also known as the Law of Action and Reaction, states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on another object, the second object will exert an equal and opposite force back on the first object.

5. How are Newton's Laws of Motion applied in everyday life?

Newton's Laws of Motion are applied in a variety of ways in everyday life, from the movement of vehicles to the motion of a ball being thrown. They help us understand and predict the behavior of objects in motion and are essential in fields such as engineering and physics.

Similar threads

How many discs will slide off the board as it decelerates?
Replies
17
Views
853
Newton's law problem: Pushing 2 stacked blocks on a horizontal table
Replies
13
Views
2K
Understanding Newton's 2nd Law of Motion
Replies
6
Views
1K
Having a hard time learning Newton's 2nd law
Replies
5
Views
862
Deriving Momentum From Newton's Second Law of Motion
Replies
27
Views
4K
Is it friction or tension acting on the person hanging on a rope?
Replies
4
Views
470
Explanation for Newton II giving negative mass in my Physics lab results please
2
Replies
44
Views
2K
Explain speed limits on curved ramp with Newton's Laws
Replies
3
Views
2K
Newton's Third Law Problem: Two masses, a rope and a pulley
Replies
21
Views
9K
Understanding Exercise 3 and 8 in Freefall and Motion Law
Replies
8
Views
1K

Hot Threads

Recent Insights

Back
Top