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A car is moving with the velocity of 50km/h.suddenly it hits a wall.the mass of car is 1399.4kg . Find the force applied by car on the wall. 
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1. What is the formula to calculate the force acting on an object?
Ans. The formula to calculate the force acting on an object is given by Newton's second law of motion: Force (F) = mass (m) × acceleration (a).
2. How can we determine the direction of the force acting on an object?
Ans. The direction of the force acting on an object can be determined by the direction of the acceleration. If the acceleration is in the same direction as the applied force, then the force acts in the same direction. If the acceleration is opposite to the applied force, then the force acts in the opposite direction.
3. What is the difference between mass and weight?
Ans. Mass is the amount of matter present in an object and is measured in kilograms (kg). Weight, on the other hand, is the force exerted by gravity on an object and is measured in newtons (N). Mass remains constant regardless of the location, while weight can vary depending on the gravitational pull.
4. How does friction affect the motion of an object?
Ans. Friction is a force that opposes the relative motion between two surfaces in contact. It acts in the opposite direction to the applied force and can either slow down or completely stop the motion of an object. Friction can also cause an object to change its direction.
5. What is the difference between speed and velocity?
Ans. Speed is a scalar quantity that measures the rate at which an object covers a distance. It is always positive and does not have any direction. Velocity, on the other hand, is a vector quantity that includes both speed and direction. It indicates the rate at which an object changes its position and can be either positive or negative, depending on the direction of motion.
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