Untitled Quiz

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Questions and Answers

Which of the following statements correctly differentiates speed from velocity?

Speed requires direction, while velocity does not.
Speed is a vector quantity, while velocity is a scalar quantity.
Speed only measures magnitude, whereas velocity measures both magnitude and direction. (correct)
Speed and velocity are identical concepts.

Velocity is represented solely by a number without any directional information.

False (B)

What can be determined from the gradient of a distance-time graph?

Speed

A distance-time graph with a flat section indicates that the object is _____

stopped Signup and view all the answers

Match the following velocity definitions to their correct types:

Scalar quantity = Speed Vector quantity = Velocity Signup and view all the answers

In a distance-time graph, which of the following indicates that an object is decelerating?

A levelling off curve (D) Signup and view all the answers

A downhill slope on a distance-time graph indicates that the object is moving backward.

True (A) Signup and view all the answers

What does a steeper graph indicate compared to a less steep graph in terms of speed?

The steeper graph indicates a faster speed. Signup and view all the answers

What is the resultant force acting on the object if 9000 N is acting to the right and 1000 N is acting to the left?

8000 N to the left (D) Signup and view all the answers

According to Newton's 3rd Law, if object A exerts a force on object B, then object B does not exert a force back on object A.

False (B) Signup and view all the answers

What is the mass of the car involved in the force scenario?

2500 kg Signup and view all the answers

In the equation $F = ma$, the letter 'a' represents _______.

acceleration Signup and view all the answers

Match the following characteristics of living things with their meaning:

M = Movement R = Reproduction S = Sensitivity G = Growth E = Excretion N = Nutrition Signup and view all the answers

Which of the following best describes the process of a rocket functioning according to Newton's 3rd Law?

It expels hot gases backward to push itself forward. (B) Signup and view all the answers

Which type of force acts downwards and is always present on objects near the Earth's surface?

Gravity (D) Signup and view all the answers

Sensitivity refers to the ability of living things to remain unaffected by environmental changes.

False (B) Signup and view all the answers

The total mass of the car and the applied forces can help us determine the ______ of the car.

acceleration Signup and view all the answers

Friction is a force that always helps to speed up an object.

False (B) Signup and view all the answers

What is the result of the forces acting on an object if the upward thrust is greater than the downward weight?

The object will accelerate upwards. Signup and view all the answers

Normal force is also known as __________ force.

Reaction Signup and view all the answers

Match the definitions to the corresponding types of forces:

Gravity = Always acts downwards Thrust = Force due to engine speeding an object up Lift = Force acting on a wing Air Resistance = Slows objects down moving through air Signup and view all the answers

What equation represents distance travelled using acceleration and time?

Distance = (1/2) × Acceleration × Time^2 (D) Signup and view all the answers

Electrostatic forces only act on charged objects.

True (A) Signup and view all the answers

What does a free body diagram represent?

All the forces acting on an object. Signup and view all the answers

The force that opposes the motion between two surfaces is called __________.

Friction Signup and view all the answers

Which of the following forces acts upwards from water?

Upthrust (C) Signup and view all the answers

Flashcards

Resultant Force

The overall force acting on an object when multiple forces are present.

Newton's 3rd Law

For every action, there is an equal and opposite reaction.