ppt

What is the definition of force?

• A push or pull that one object exerts on another

• The speed of an object

• The color of an object

• The temperature of an object

Which of the following is a common misconception related to the concept of force?

• The strength of gravity depends on weight

• Gravity only pulls objects downward

• Force requires physical contact between objects

• Force always acts in the direction of motion

What is the first condition of equilibrium?

• The net external torque on a system must be zero

• The object must be moving at a constant speed

• The sum of forces acting on a body must add up to zero

• The object must be at rest

Which of the following is a key idea related to planetary motion and Kepler's laws?

• Kepler's laws apply only to Earth's orbit around the Sun

• Planets move at constant speeds throughout their orbits

• Planetary orbits are perfect circles

• Kepler's third law applies only to planets

What does Newton's law of universal gravitation state?

• The speed of a planet in its orbit around the Sun is constant

• The square of a planet's orbital period is proportional to the cube of its average distance from the Sun

• Gravity is a universal force that attracts all objects with mass toward each other

• Gravity only pulls objects downward

What is work?

• The time taken to complete a task

• The distance an object moves

• The force applied to an object

• The product of force and distance in the direction of the force

Which of the following is a misconception related to the concept of work?

• Work is the product of force and distance in the direction of the force

• Work is done only when an object is in motion

• Work is the same as power

• Work is not related to energy

What is the cause of tides?

• The rotation of the Earth

• The gravitational forces exerted by the moon and sun

• The wind patterns on the ocean

• The movement of underwater currents

What is the second condition of equilibrium?

• The sum of forces acting on a body must add up to zero

• The net external torque on a system must be zero

• The object must be at rest

• The object must be moving at a constant speed

Which of the following is a key idea related to the law of universal gravitation?

• Gravity only pulls objects downward

• The strength of gravity depends on weight

• Gravity requires physical contact between objects to exert a force

• Gravity is a universal force that attracts all objects with mass toward each other