Physics Challenge

What is the SI unit of force?

• Meter (m)

• Newton (N)

• Kilogram (kg)

• Second (s)

What is the formula to calculate acceleration?

• acceleration = (final velocity - initial velocity) / time

• acceleration = (final velocity * initial velocity) / time

• acceleration = final velocity / time

• acceleration = (final velocity + initial velocity) / time

Explain the concept of Newton's First Law of Motion.

• An object will accelerate when no force is applied.

• Objects in motion will stop without any external force.

• An object will change direction without any external force.

• An object will remain at rest or in motion unless acted upon by an external force.

Define the term 'work' in physics.

• Work is the product of force and distance.

• Work is measured in kilograms.

• Work is the same as power.

• Work is the result of speed and time.

What is the law of conservation of energy?

• Energy can be transformed into matter

• Energy can be destroyed completely

• Energy cannot be created or destroyed, only transferred or transformed.

• Energy can be created out of nothing

Describe the difference between speed and velocity.

• Speed is scalar, velocity is vector.

• Speed and velocity are the same thing.

• Velocity is measured in kilometers per hour, speed in meters per second.

• Speed is a vector quantity, velocity is a scalar quantity.

What is the formula to calculate momentum?

• p = m * v

• p = m / v

• p = m + v

• p = m ^ v

Explain the concept of centripetal force.

• Centripetal force is the force that increases the speed of an object in a circular path.

• Centripetal force is the force that keeps an object moving in a circular path.

• Centripetal force is the force that pushes an object away from the center of rotation.

• Centripetal force is the force that causes an object to move in a straight line.

Define the term 'refraction' in physics.

• Refraction is the reflection of light off a surface

• Refraction in physics refers to the change in direction of a wave passing from one medium to another or from a gradual change in the medium.

• Refraction is the bending of light due to gravity

• Refraction is the absorption of light by a medium

What is the relationship between frequency and wavelength in physics?

• Direct

• Inverse

• Constant

• Proportional