Physics Grade 10 Ethiopia

What is the SI unit of force?

• Newton (N)

• Volt

• Watt

• Joule

Define acceleration.

• Acceleration is the force acting on an object.

• Acceleration is the distance traveled per unit time.

• Acceleration is the rate of change of velocity with respect to time.

• Acceleration is the speed of an object.

Explain the difference between mass and weight.

• Mass is measured in pounds, weight is measured in kilograms.

• Mass is the weight of an object, weight is the size of an object.

• Mass is the volume of an object, weight is the density of an object.

• Mass is the amount of matter in an object, weight is the force exerted on an object due to gravity.

What is the formula to calculate speed?

• Speed = Distance / Time

• Speed = Distance x Time

• Speed = Time / Distance

• Speed = Distance + Time

Describe the concept of inertia.

• Inertia is the resistance of an object to changes in its state of motion.

• Inertia is the ability of an object to move without any force applied to it.

• Inertia is the tendency of an object to speed up when a force is applied to it.

• Inertia is the measure of an object's weight.

What is the law of conservation of energy?

• Energy can be destroyed completely

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

• Energy can be created out of nothing

• Energy can be transformed into matter

Explain the difference between potential energy and kinetic energy.

• Potential energy is energy in motion, while kinetic energy is stored energy.

• Potential energy is the energy of an object at rest, while kinetic energy is the energy of an object in motion.

• Potential energy and kinetic energy are the same concept.

• Potential energy is stored energy, while kinetic energy is energy in motion.

Define momentum.

• Momentum is the energy stored in an object.

• Momentum is the force exerted by an object.

• Momentum is the product of an object's mass and velocity.

• Momentum is the acceleration of an object.

What is the formula to calculate work?

• Work = Velocity x Time

• Work = Mass x Acceleration

• Work = Force x Distance

• Work = Energy / Distance

Describe the concept of power.

• Power is the ability to influence or control others, resources, or events.

• Power is the ability to run fast

• Power is the ability to generate electricity

• Power is the ability to cook food