Physical Sciences - Trial Test

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Questions and Answers

The rate at which an object moves over a distance is called __________.

speed

What is used to calculate average speed?

Distance travelled divided by time taken (correct)

Time taken multiplied by distance

Change in position divided by time

Acceleration multiplied by mass

Velocity only refers to the speed of an object.

False

What forces act on a car traveling along a straight road?

Applied force, gravity, friction, upward force from road (normal) Signup and view all the answers

What must be stated to fully describe velocity?

The direction of motion Signup and view all the answers

An object changes speed due to __________ acting on it.

unbalanced force Signup and view all the answers

Match the terms with their correct definitions:

Acceleration = Rate of change of speed Potential Energy = Stored energy Equal and Opposite Force = Reaction force applied by an object Law of Conservation of Energy = Energy cannot be created or destroyed Signup and view all the answers

What is the formula for calculating average acceleration?

Change in speed divided by time taken Signup and view all the answers

What is Newton's Second Law of Motion expressed as?

F = ma Signup and view all the answers

An object in motion will remain in motion unless acted upon by an unbalanced force.

True Signup and view all the answers

What is the mass of an object if a force of 160 N causes it to accelerate at 2 m/s²?

80 kg Signup and view all the answers

The potential energy of an object is calculated using the formula PE = m.g.h, where g is equal to ____ m/s².

9.8 Signup and view all the answers

Match each scenario to the type of energy it represents:

Bicyclist pedaling up a hill = Kinetic Energy Archer with bow drawn = Potential Energy Volleyball player spiking a ball = Kinetic Energy Bowling ball sitting on the rack = Potential Energy Signup and view all the answers

What is the force needed to accelerate a 1400 kg car at 3 m/s²?

4200 N Signup and view all the answers

Kinetic energy can be expressed as KE = ½mv².

True Signup and view all the answers

Calculate the kinetic energy of a 1000-kg roller coaster car moving at 20.0 m/s.

200,000 J Signup and view all the answers

Study Notes

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.

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Description

Test your understanding of key concepts in Physical Sciences, including speed, velocity, acceleration, and Newton's laws of motion. This trial test will cover fundamental principles and calculations that are essential in the study of physics. Prepare to challenge your knowledge and apply these concepts effectively.