Calculating Force: Homework Solving

  • Thread starter Thread starter dagitt
  • Start date Start date
  • Tags Tags
    Force
Click For Summary
SUMMARY

The discussion focuses on calculating net force for two scenarios involving a race car and a baseball. For the race car, with a mass of 718 kg, it accelerates uniformly over 44.0 m in 3.0 s, requiring the application of the formula F=ma to determine the net force. In the second scenario, a baseball decelerates from 31.0 m/s to 0.0 m/s in 0.0050 s, necessitating the calculation of acceleration and force using the same principles. The user expresses difficulty in understanding the force acting on the baseball and the player catching it, indicating a need for clearer explanations and calculations.

PREREQUISITES
  • Understanding of Newton's Second Law (F=ma)
  • Knowledge of kinematic equations for uniformly accelerated motion
  • Basic concepts of acceleration and deceleration
  • Ability to perform unit conversions and calculations in physics
NEXT STEPS
  • Study the derivation and application of kinematic equations in physics
  • Learn how to calculate net force using F=ma with various examples
  • Explore the concept of impulse and momentum in relation to force
  • Practice solving problems involving acceleration and force in real-world scenarios
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone seeking to improve their problem-solving skills in force and motion calculations.

dagitt
Messages
6
Reaction score
0

Homework Statement


a) A race car has a mass of 718 kg. It starts from rest and travels 44.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?

b) As a baseball is being caught, its speed goes from 31.0 m/s to 0.0 m/s in about 0.0050 s.
(First I found out that the baseball's acceleration was -6200).
What are the magnitude and direction of the force acting on it?
What are the magnitude and direction of the force acting on the player who caught it


Homework Equations


a = change in velocity / change in time
F=ma
a = net force / mass



The Attempt at a Solution


a) i used the constant acceleration formula to find "a", then plugged it into the net force formula. my answer was wrong.

b) i have absolutely no idea what force is 'acting' on it, or how to approach the solution to the next two requirements. i simply am not a physics person. any or all help dearly appreciated. thank you
 
Physics news on Phys.org
Show your calculations. We will see where you have made mistakes.
 

Similar threads

Newton's laws homework: inclined plane with pulley
  • · Replies 12 ·
Replies
12
Views
1K
Equilibrium of Forces and Torques on Sawhorses Supporting a Person on a Board
  • · Replies 6 ·
Replies
6
Views
3K
Motion of a Parachuter (Terminal Velocity, Time of Flight, Distance)
  • · Replies 10 ·
Replies
10
Views
2K
How to calculate the wind force acting on a water drop?
  • · Replies 39 ·
2
Replies
39
Views
4K
Calculation of Box's Acceleration on a Trailer with Friction
  • · Replies 9 ·
Replies
9
Views
2K
Distribution of Energy when work is done on a system of 2 masses connected by a spring
  • · Replies 17 ·
Replies
17
Views
2K
Force decreased but velocity continues to increase
  • · Replies 6 ·
Replies
6
Views
1K
The average force needed to throw a baseball 90mph?
  • · Replies 5 ·
Replies
5
Views
6K
Speed of train car when sand spilling out from it
  • · Replies 17 ·
Replies
17
Views
4K
Resistance force changing the velocity of an object
  • · Replies 8 ·
Replies
8
Views
1K