Ks3 Physics Formulas Quiz Questions

Explanation
The formula for acceleration is A=(V-U)/T. This formula represents the change in velocity (V-U) divided by the time taken (T). It is derived from the basic definition of acceleration as the rate of change of velocity over time. By subtracting the initial velocity (U) from the final velocity (V) and dividing it by the time interval (T), we can determine the acceleration of an object.

Explanation
The equation F=MA represents Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. This equation shows the relationship between force, mass, and acceleration, and is commonly used to calculate the force exerted on an object given its mass and acceleration.

Explanation
The equation to find velocity is given by dividing the displacement by time. This is because velocity is defined as the rate of change of displacement with respect to time. Therefore, to calculate velocity, we need to know the displacement (change in position) and the time taken for that displacement to occur. By dividing the displacement by the time, we can determine how fast an object is moving in a specific direction.

Explanation
The equation to find weight is given by multiplying the mass of an object by the acceleration due to gravity. This equation is derived from Newton's second law of motion, which states that the force acting on an object is equal to its mass multiplied by its acceleration. In the case of weight, the force is the gravitational force acting on the object, and the acceleration is the acceleration due to gravity. Therefore, the correct equation to find weight is Weight = Mass x Acceleration due to Gravity.

Explanation
When a fluid is moving faster, it creates a decrease in pressure. This can be explained by Bernoulli's principle, which states that as the speed of a fluid increases, its pressure decreases. This is because the faster-moving fluid particles exert less force on the surrounding surfaces, resulting in a decrease in pressure. Therefore, when a fluid is moving faster, the pressure decreases.

Explanation
The unit of pressure, Pascal, is defined as Newton per metre squared. This means that it is a measure of force per unit area. The Newton is the unit of force and the metre squared represents the area over which the force is applied. Therefore, the correct answer is Newton per metre squared.

Explanation
The given formula for Hooke's Law states that the force (f) is equal to the product of the spring constant (k) and the displacement (e). This formula is derived from experimental observations that show the relationship between the force applied to a spring and the resulting displacement. The spring constant represents the stiffness of the spring, and the displacement refers to the amount the spring is stretched or compressed from its equilibrium position. Therefore, the correct answer is f = k x e.

Explanation
The formula for wavespeed is given by multiplying the frequency and the wavelength of the wave. This is because wavespeed is defined as the distance traveled by a wave per unit time, and the wavelength represents the distance between two consecutive points on the wave that are in phase. The frequency, on the other hand, represents the number of complete cycles of the wave that occur in one second. Therefore, multiplying the frequency and the wavelength will give us the distance traveled by the wave in one second, which is the wavespeed.