Physics 10th Class: Forces and Motion

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Questions and Answers

What is the energy of an object in motion called?

Potential energy

Capacity energy

Force energy

Kinetic energy (correct)

When the force applied to an object is perpendicular to its motion, what can be achieved?

The object will not move

Work can be achieved (correct)

No work can be done

Force is ineffective

If clowns can spin plates on sticks, where are the plates’ centers of mass located?

At the plate’s edge

In the air above the plate

At any point on the plate

At the plate’s origin (correct)

What happens to an object if a large amount of power is used?

It does a large amount of work Signup and view all the answers

Which of the following is NOT a measure of area?

Time Signup and view all the answers

What is the formula for every straight line in mathematics?

y = mx + b Signup and view all the answers

How does the decimal point's movement relate to scientific notation's exponent?

It becomes positive when moving to the left Signup and view all the answers

What is 18 mm converted to inches when rounded to the nearest hundredths?

0.71 inches Signup and view all the answers

What will happen to two balls made of different materials upon impact if they travel at constant speed?

Both balls will change direction. Signup and view all the answers

Which type of collision occurs when two billiard balls collide with the same amount of force?

Elastic Signup and view all the answers

What makes the statement regarding random errors INCORRECT?

Errors Signup and view all the answers

Which statement does NOT describe an object influenced by balanced forces?

The object is constantly accelerating. Signup and view all the answers

What is the correct quadrant in the Cartesian plane for x < 0 and y > 0?

Quadrant II Signup and view all the answers

Which of the following angles corresponds to when displacement in projectile motion reaches its maximum value?

θ = 45° Signup and view all the answers

Which formula best represents the Impulse-Momentum Theorem?

F∆t = m∆v Signup and view all the answers

In a 3D Cartesian plane, given a ball's velocity of 2.5 m/s, what is the z-component value if the angles are θ = 60° and φ = 30°?

2.17 m/s Signup and view all the answers

Which condition proves that Quadrant III in the Cartesian coordinate system indeed provides negative-negative values?

x < 0, y < 0 Signup and view all the answers

If an average human heart beats 60 times per minute, what is the total number of beats in a lifetime if a person lives to 90 years?

2.77 billion beats Signup and view all the answers

What is the significance of determining the unit vector values of some vectors?

Because the magnitude is always one (1) Signup and view all the answers

What describes a projectile in motion incorrectly?

A projectile is always moving upwards. Signup and view all the answers

What is the impact velocity defined as?

Measured velocity as it approaches its destination Signup and view all the answers

What is the impact velocity of an object generally dependent on?

Launch velocity Signup and view all the answers

In what quadrant of the Cartesian plane does x > 0 and y < 0 reside?

Quadrant IV Signup and view all the answers

If a person's heart beats 60 times a minute, how many total beats does it produce in one year?

31,536,000 beats Signup and view all the answers

What does Newton’s Second Law, the Law of Inertia, state about an object's motion?

An object will remain at rest unless acted upon by an outside force. Signup and view all the answers

What was the primary purpose of developing the SI (Système international) system?

To standardize units for easier and faster conversion. Signup and view all the answers

In which country was the SI (Système international) first developed?

France Signup and view all the answers

What is the correct conversion of 9,800,000 mm to miles?

6.09 mi Signup and view all the answers

Which equation best represents a conservative force?

W = T + U Signup and view all the answers

Where would the center of mass be located on a 4 m steel bar with a 10 kg weight on one side and a 5 kg weight on the other side?

Near the heavier object. Signup and view all the answers

How would you describe the path of a projectile?

Parabolic Signup and view all the answers

Which of the following is NOT a component of force?

Velocity Signup and view all the answers

Which option does NOT follow a rule in writing scientific notations?

The base is always 11. Signup and view all the answers

What term is correctly associated with the relationship indicated by X : Y : Z in coordinates?

Applicant Signup and view all the answers

Which term is NOT considered a key concept in understanding precision?

Research Signup and view all the answers

What term refers to errors in data or lapses during experiments?

Error Signup and view all the answers

What is the correct speed of the Titanic in m/s?

15,384.3 m/s Signup and view all the answers

What is the momenta of the ship and iceberg before the collision?

498,622,068.8 kg.m/s; 0 kg.m/s Signup and view all the answers

What is the velocity of the ship if the iceberg stopped and crumbled after the collision?

14,444.44 m/s Signup and view all the answers

Which of the following statements about scientific notations is incorrect?

Radical notation can be used interchangeably with scientific notation. Signup and view all the answers

Study Notes

Physics Concepts

Newton’s Second Law: An object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity unless acted upon by a net force.
Impulse-Momentum Theorem: This theorem states that the change in momentum of an object is equal to the impulse applied to it.

Forces

Balanced Forces: Occur when the net force on an object is zero, resulting in no change in its motion.
Unbalanced Forces: Occur when the net force on an object is not zero, causing a change in its motion.
Conservative Forces: A force that does not depend on the path taken, only the initial and final positions.
Applied Force: A force applied to an object by another object.
Frictional Force: A force that opposes motion between two surfaces in contact.
Normal Force: A force exerted by a surface that prevents an object from passing through it.

Motion

Projectile Motion: The motion of an object that is thrown or projected into the air.
Free-Fall: The motion of an object that is only influenced by gravity.
Velocity: The rate of change of an object's position, including both speed and direction.
Impact Velocity: The velocity of an object just before it collides with another object.
Displacement: The change in position of an object.

Energy

Kinetic Energy: The energy of a moving object.
Potential Energy: The energy of an object due to its position or configuration.

Units and Conversions

SI Units: An internationally recognized system of units.
Scientific Notation: A way of representing very large or very small numbers using exponents.

Graphs

Pie Chart: A type of graph that shows the proportion of a whole that each part represents.
Scatter Plot: A type of graph that shows the relationship between two variables.
Histogram: A type of graph that shows the distribution of data.
Time Series: A type of graph that shows data over time.

Cartesian coordinate system

Quadrant I: x>0, y>0
Quandrant II: x<0, y>0
Quadrant III: x<0, y<0
Quadrant IV: x>0, y<0

Center of mass

Located at the point where the object's mass is evenly distributed.

Titanic example

The Titanic's speed was 14,444.44 m/s
The momenta of the ship was 498,622,061.8 kg.m/s
The momenta of the iceberg was 1 kg.m/s assuming the iceberg completely stopped and crumbled after impact.
The velocity of the ship after the collision would still be 14,444.44 m/s.

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Description

Test your understanding of key physics concepts in forces and motion. This quiz covers Newton's Second Law, balanced and unbalanced forces, and the impulse-momentum theorem. Challenge yourself and see how well you can apply these fundamental principles!