According to the third law of motion,when we push on an object,the object pushes back on us with an equal and opposite force. If the object is a massive truck parked along the roadside,it will probably not move. $A$ student justifies this by answering that the two opposite and equal forces cancel each other. Comment on this logic and explain why the truck does not move.
(N/A) The truck has a large mass,which results in a very high static friction between the tires and the road.
To move the truck,the applied force must exceed the maximum static frictional force.
When a person pushes the truck and it does not move,the applied force is balanced by the static frictional force acting in the opposite direction.
Therefore,the student's logic is correct in the context that the net force on the truck is zero because the applied force and the frictional force cancel each other out.
To move the truck,the applied force must exceed the maximum static frictional force.
When a person pushes the truck and it does not move,the applied force is balanced by the static frictional force acting in the opposite direction.
Therefore,the student's logic is correct in the context that the net force on the truck is zero because the applied force and the frictional force cancel each other out.
Explore More
Similar Questions
Two objects,each of mass $1.5\, kg$,are moving in the same straight line but in opposite directions. The velocity of each object is $2.5\, m/s$ before the collision during which they stick together. What will be the velocity (in $m/s$) of the combined object after collision?
Difficult
View SolutionWhat is the momentum of an object of mass $m$, moving with a velocity $v$?
Easy
View SolutionThe following is the distance-time table of an object in motion:
Time in seconds Distance in metres $0$ $0$ $1$ $1$ $2$ $8$ $3$ $27$ $4$ $64$ $5$ $125$ $6$ $216$ $7$ $343$
$(a)$ What conclusion can you draw about the acceleration? Is it constant, increasing, decreasing, or zero?
$(b)$ What do you infer about the forces acting on the object?
| Time in seconds | Distance in metres |
| $0$ | $0$ |
| $1$ | $1$ |
| $2$ | $8$ |
| $3$ | $27$ |
| $4$ | $64$ |
| $5$ | $125$ |
| $6$ | $216$ |
| $7$ | $343$ |
$(a)$ What conclusion can you draw about the acceleration? Is it constant, increasing, decreasing, or zero?
$(b)$ What do you infer about the forces acting on the object?
Medium
View Solution$A$ hammer of mass $500 \,g$,moving at $50 \,m/s$,strikes a nail. The nail stops the hammer in a very short time of $0.01 \,s$. What is the force (in $N$) of the nail on the hammer?
Medium
View SolutionExplain,why is it difficult for a fireman to hold a hose,which ejects large amounts of water at a high velocity.
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo