Physics Quiz

What is the measure of how much matter is in an object?

• Weight

• Mass

• Volume

• Density

Answer explanation

Mass is the measure of how much matter is in an object, while weight is the force of gravity acting on an object. Volume is the amount of space an object occupies, and density is the mass per unit volume.

What is the net force on a 10kg wagon accelerating at a rate of 10m/s²? (Multiply by ten)

• 100 N

• 10 N

• 1000 N

• 1 N

Answer explanation

The net force is calculated by multiplying mass (10kg) by acceleration (10m/s²), resulting in 100 N.

Tags

NGSS.MS-PS2-2

What happens when two forces act in the same direction?

• They cancel each other out

• They create a vacuum

• They add up

• They cause a rotation

Answer explanation

When two forces act in the same direction, they add up, resulting in a combined force that is the sum of the individual forces.

Tags

NGSS.MS-PS2-2

Why do you keep going forward after a car has stopped?

• Because of the car's acceleration

• Due to the gravitational pull

• Because of the inertia

• Due to the driver's control

Answer explanation

When a car turns right, the centrifugal force pushes you towards the left due to the car's acceleration and the inertia of your body.

What is the law of inertia?

• An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

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

• The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

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

Answer explanation

The law of inertia states that an object at rest remains at rest, and an object in motion continues in motion with the same speed and direction unless acted upon by an unbalanced force.

The equation that describes the relationship between force, mass and acceleration is?

• F = m + a

• F = ma

• F = m/a

• F = m - a

Answer explanation

The correct equation that describes the relationship between force, mass, and acceleration is F = ma, where F is force, m is mass, and a is acceleration.

Tags

NGSS.HS-PS2-1

Energy that depends on height is called?

• Kinetic Energy

• Gravitational Potential Energy

• Thermal Energy

• Chemical Energy

Answer explanation

Potential Energy is the energy that depends on height, as it is the energy an object possesses due to its position relative to other objects.

What factors would give an object greater gravitational potential energy?

• A higher mass

• A lower height above the ground

• A higher speed

• A higher height above the ground and greater mass

Answer explanation

An object would have greater gravitational potential energy if it is at a higher height above the ground.

Tags

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NGSS.MS-PS3-2

What object has more kinetic energy?

• A stationary object

• An object moving at 10 m/s

• An object moving at 20 m/s

• All have the same kinetic energy

Answer explanation

An object moving at 20 m/s has more kinetic energy because kinetic energy is directly proportional to the square of the velocity, so the object moving at 20 m/s has more kinetic energy than the object moving at 10 m/s or the stationary object.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is kinetic energy?

• The energy possessed by an object due to its motion

• The energy possessed by an object due to its position

• The energy stored within chemical bonds

• The total energy of an object's particles due to their movement or position

Answer explanation

Kinetic energy is the energy possessed by an object due to its motion, making the correct choice the energy possessed by an object due to its motion.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5