Physical Sciences - Trial Test

Physical Sciences - Trial Test

• Speed: A measure of the rate at which an object moves over a distance.
• Average Speed: Calculated by dividing the total distance travelled by the total time taken.
• Velocity: A measure of the rate of change in position, including direction.
• Instantaneous Speed: An object's speed at a specific moment in time.
• Acceleration: The rate at which an object changes its speed or direction.
• Average Acceleration: Calculated by dividing the change in speed by the time taken for the change.
• Newton's First Law: An object will remain at rest or will not change its speed or direction unless acted upon by an unbalanced force.
• Newton's Second Law: The acceleration of an object depends on the mass of the object and the total force acting on it (F = ma).
• Newton's Third Law: When one object applies a force to a second object, the second object applies an equal and opposite force to the first object.
• Potential Energy: Stored energy.
• Law of Conservation of Energy: Energy is never created or destroyed.
• Kinetic Energy: Energy of motion (KE = 1/2mv²).
• Potential Energy: Stored energy (PE = mgh).

Applied Forces and Motion

• Forces on a Car: A car on a straight road experiences forces: thrust (from the engine), gravity, friction (from the road), and a normal force from the road.
• False Statement: A car travelling on a straight road has forces acting on it (thrust(from the engine), gravity, friction from the road, and a normal force from the road,).

Formulae

• Kinetic Energy (KE) = ½mv²
• Potential Energy (PE) = mgh

Problem Solving

• Examples of calculations for average speed, finding distances, forces, and calculating kinetic and potential energy using formulas provided are shown in the document.