- Home/
- SSC & Railways/
- Article
A Stone of 1kg is Thrown With a Velocity of 20ms-1 Across the Frozen Surface of a Lake and Comes to Rest After Travelling a Distance of 50m. What is the Force of Friction Between the Stone and the Ice?
By BYJU'S Exam Prep
Updated on: September 25th, 2023
The force of friction between the stone and the ice is -4 N.
Step 1: Given that Mass of stone, m = 1kg
The final velocity of the stone, v= 0
The initial velocity of the stone, u= 20ms-1
Distance covered by the stone, s = 50m
Step 2: Now we have to use below mentioned formulae
v2=u2+2as
F=m×a, where F is force.
Step 3: Now we have to calculate the acceleration and force of friction
Using,
v2=u2+2as
Substituting the formula in above formula we get
0=202+2×a×50
On rearranging we get
100a=-400
a=-400/100
a=-4ms-2
Hence, the acceleration of stone is -4ms-2. Here, -ve sign shows retardation.
We have
F=m×a
Substituting the values in the above formula
F=m×a
F=1×(-4)
F=-4N
The -ve symbol here indicates that the force, which is the frictional force, is acting in the opposite direction.
Factors affecting Frictional Force
- Surface roughness and the amount of force pressing them together have the biggest impact on these forces.
- The amount of frictional force is influenced by the object’s position and angle.
- The frictional force will be equal to the weight of the object if it is put flat against another object.
- The frictional force will increase and surpass the weight of the thing if an object is pushed up against the surface.
Summary:-
A Stone of 1kg is Thrown With a Velocity of 20ms-1 Across the Frozen Surface of a Lake and Comes to Rest After Travelling a Distance of 50m. What is the Force of Friction Between the Stone and the Ice?
A stone of 1kg is thrown with a velocity of 20ms-1 across the frozen surface of a lake and comes to rest after travelling a distance of 50m. The force of friction between the stone and the ice is -4 N.
Related Questions:-
- What Criteria Do We Use to Decide Whether Something is Alive
- What is Meant by a Substance
- What is the Formula of A3 Plus B3
- What is the Molecular Mass of Glucose Molecule C6 H12 O6
- When Water is Added to Quicklime Rise in Temperature is Observed This is an Example of Reaction
- Which Mixture of the Solution Will Lead to the Formation of Negatively Charged Colloids of Agii