When the horse is applying force to start the cart it has to overcome static friction and to keep the cart in motion,the horse has to overcome sliding friction. But static friction is more than sliding friction ,so the horse, pulling a cart has to apply a greater force to start the cart than to keep the cart in motion.
Why does it take more force to start?
at starting there is static friction so more force is applied after then kinetic friction is applied an we know that static friction is greater than kinetic friction so more force is required in starting .
Why do horses pull harder during the first few steps?
A horse has to pull the cart harder during the first few steps of his motion because the horse has to work against the maximum value of static friction that comes into play when a body is just at the point of sliding over the surface of another body. … Dynamic friction is lesser than the limiting friction.
What are the laws of limiting friction?
Laws of limitinf friction:
- The direction of limiting frictional force is always opposite the direction of motion.
- Limiting friction acts tangential to the two surfaces in contact.
- The magnitude of limiting friction is directly proportional to the normal reaction between the two surfaces.
What is the motion of horse pulling a cart?
Answer: A horse pushes the ground in the backward direction. According to Newton’s third law of motion, a reaction force is exerted by the Earth on the horse in the forward direction. As a result, the cart moves forward.
Does it take a stronger force to slow something down or speed it up?
When a force pushes or pulls the object, the object will move in the direction of the force. The bigger the force, and the lighter the object, the greater the acceleration. It can also make something slow down, speed up or change direction.
Can you exert more force than your weight?
The lever acts as a force multiplier, so you can exert more downward force than your own weight. If you think about Newton’s third law and standing still vs jumping. When you stand still the ground exerts a reaction force on you which is equal and opposite to your weight by Newton’s third law.
Why is pulling easier than pushing?
Friction is the force acting between the object and the surface. … So, when there will be less force of friction, it is easier in that case to move the body. Hence, it is easier to pull than to push a body.
What is static friction?
In static friction, the frictional force resists force that is applied to an object, and the object remains at rest until the force of static friction is overcome. In kinetic friction, the frictional force resists the motion of an object.
What is dynamic friction?
Kinetic friction, also known as dynamic friction or sliding friction, occurs when two objects are moving relative to each other and rub together (like a sled on the ground).
What is limiting friction with example?
Examples of limiting friction forces are : 1) When you walk on the road. 2) When a car move on a cliff. 3) Friction force applied by upstream water to a swimmer. 4) Friction force on a pen by a page or notebook.
How friction is an evil?
Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. But almost all crucial tasks cannot be carried out without the presence of friction.
What is the difference between static and limiting friction?
Answer: In short, static friction is the same as the force being applied because the body isn’t moving. Static friction is acting due to the body tends to move when a force is acting on it. Limiting friction is the friction acting on a body when it is about to start moving.
Does See Saw show oscillatory motion?
Class 7 Question
a)Swingb)Fanc)See-saw d)PendulumCorrect answer is option ‘B’. … The Questions and Answers of Which of the following does not show oscillatory motion? a)Swingb)Fanc)See-saw d)PendulumCorrect answer is option ‘B’.
When a horse pulls a cart The cart also pulls the horse backwards explain how the motion takes place?
Here is a famous problem: A horse is pulling on a cart, and the cart pulls back with the same amount of force. If all forces are equal, how can the horse and cart move? Answer: The horse moves because the force he exerts with his hooves is greater than the force of the wagon pulling him back.
What happens to the speed of a cart when a horse applies more force?
When the horse applies more force, the speed of the cart also increases.