Calculate Total Force on a Moving Car | Simple Force Question Homework

  • Thread starter Thread starter Husker70
  • Start date Start date
  • Tags Tags
    Force
AI Thread Summary
The total force on a car moving at a constant speed of 1.44 m/s, regardless of direction, is zero due to the absence of acceleration. The equation F=ma indicates that if acceleration (a) is zero, the net force (F_net) must also be zero. Thus, both scenarios—moving to the right or left—result in no net force acting on the car. The initial calculation provided is incorrect as it misapplies the concept of acceleration. The conclusion is that the total force on the car is zero in both cases.
Husker70
Messages
89
Reaction score
0

Homework Statement


(a) A car with a mass of 850kg is moving to the right with a constant
speed of 1.44 m/s . What is the total force on the car? (b) What is the total
force on the car if it is moving to the left?


Homework Equations


F=ma


The Attempt at a Solution


(a)F = 850kg(1.44m/s) = 1.22 x 10 third power
(b) is the same

Does this seem right?
Thanks,
Kevin
 
Physics news on Phys.org
Note the constant speed. If there is constant speed, there is no acceleration. Therefore:

F_net must equal zero.

F=ma

You don't plug in velocity for the acceleration in that equation.
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Final Velocity of a car with a opposing decreasing drag force
2
Replies
57
Views
2K
Problem with the power of car
Replies
3
Views
866
Pressure question: Weight of a car calculated from tyre contact patch area
Replies
3
Views
900
Breaking Distance of a Car Traveling on an Inclined Plane
Replies
2
Views
3K
Force on the car in a collision
Replies
38
Views
3K
Lifting an object, kinetic energy, work and forces
Replies
11
Views
6K
Force to apply to a loop moving away from a current-carrying wire
Replies
4
Views
2K
Normal Force on Car at Top of Rounded Hill
Replies
2
Views
1K
Motion on a rough inclined plane
Replies
5
Views
2K
What is the induced magnetic force on this closed current loop?
Replies
12
Views
2K

Hot Threads

Recent Insights

Back
Top