A force is defined as a
Force is a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object
One way that you can recognize that a force is acting on an object:
If the force applied on the object is in the direction of its motion, the speed of the object increases. A change in either the speed of an object, or its direction of motion, or both, is described as a change in its state of motion. Thus, a force may bring a change in the state of motion of an object.
A 1-kg object is lying on the ground. An unbalanced force of magnitude 1 N is applied to the object. Which of these options explains the motion of the object as a result of the acting force?
If an object experiences a net zero unbalanced force, then the body:
If an object experiences a net zero unbalanced force, then the body moves with a constant velocity, or if it was at rest, then it continues to remain at rest.
Identify from the following, the case where balanced force acts on it.
If more than two forces act on a body and all the forces acting upon the object balance each other and their resultant force acting on the object is zero, the object is said to be at equilibrium or balanced force is acted on the object resulting no acceleration in the body, that is the body may be at rest or it may move with a uniform speed.
A stone of 1 kg is thrown with a velocity of 20 m s–1 across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?
Here, m = 1kg, u = 20 ms-1, v = 0, s = 50m, F = ?
From v2 - u2 = 2as
0 - (20)2 = 2a x 50 = 100a
a = -400/100
a = -4 ms-2
∴ F = ma
F = 1 (-4)
F = -4 N
Negative sign indicates that force of friction is opposing the motion of the ball.
__________ is a force, which always opposes the motion of one body over the other body in contact with it
Friction is a a force that comes into play when two surfaces come in contact with each other. The frictional force acts in the opposite direction of the motion of the object. The force of friction opposes the relative motion between the surfaces of two moving objects.
If an object moves with a uniform velocity we can conclude that
If no unbalanced force will be applied then how will the object move because if we apply balanced force then the object will remain at rest.
When a force is exerted on an object, it can change its:
1.for state - if we exert high force on ice it slowly start converting into water I.e liquid thus state is change by force.
2.for position - if we push a box it change its position. thus force also change position.
3. for shape - if we press a clay it will change its shape so we can conclude that force change shape also.
SI unit of force is kg ms-2. This unit is also known as:
Kg ms-2 is also called Newton as unit of force is newton.