post test Gravity and Kinetic Energy

Front

What is average speed?

Back

Average speed is the total distance traveled divided by the total time taken. It is measured in kilometers per hour (km/h).

Front

How do you calculate average speed?

Back

Average speed = Total Distance / Total Time.

Front

What happens to an object in free fall?

Back

An object in free fall accelerates downwards due to gravity, increasing its speed by approximately 10 meters per second every second.

Front

What is gravitational force?

Back

Gravitational force is the attraction between two masses, which causes objects to be pulled towards each other.

Front

How does weight differ from mass?

Back

Weight is the force exerted by gravity on an object, while mass is the amount of matter in an object. Weight = Mass x Gravitational acceleration (g).

Front

What is the weight of a 2.5 kg object on Earth?

Back

Weight = Mass x g = 2.5 kg x 9.8 m/s² = 24.5 newtons (approximately 25 newtons).

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the formula for kinetic energy?

Back

Kinetic Energy (KE) = 1/2 x Mass (m) x Velocity (v)².

Front

What is the effect of a constant force on a moving object?

Back

A constant force acting on a moving object will change its speed, either increasing or decreasing it, depending on the direction of the force.

Front

What does it mean for an object to move at a constant speed?

Back

An object moving at a constant speed travels equal distances in equal intervals of time, without acceleration.