In which of the following cases are the equations of motion not valid?

The driver of a car moving at a speed of 20 m/s applies the brakes on seeing a rock at some distance. The car stops after 12 s. The acceleration of the car is -___m/s².

A car starts from rest and keeps increasing its speed by 3 m/s every second. The final speed that it reaches after 20 seconds is _____.

A vehicle moving at a speed of 12 m/s accelerates at a rate of 6 m/s² for 7 seconds. The final velocity of the vehicle is _____.

A bus starts from rest and attains a velocity of 30 m/s in 5 s. Its acceleration is ____ m/s².

The area under a v-t graph gives the _____ of the body.

Which of the following is called the velocity-time relation?

A body is thrown vertically upwards. It’s acceleration ___ as it reaches the maximum height.

A car started from rest and increased its speed to 60 m/s in a minute. The acceleration of the car is ___ m/s².

In which of the following cases can the equations of motion not be applied?

A body is in a uniform circular motion. The equations of motion are _____.

The driver of a car moving at a speed of 20 m/s applies the brakes on seeing a rock at some distance. The car stops after 5 s. The car traveled ___ m after the brakes were applied.

Negative acceleration is known as deceleration.

A bus starts from rest and keeps increasing its speed by 3 m/s every second. It covers a distance of ____ in 20 s.

A vehicle moving at a speed of 24 m/s accelerates to 56 m/s in 4 s. The acceleration of the vehicle is ___ m/s².

A biker starts from rest and attains a velocity of 10 m/s in 5 s. Her acceleration is ____ m/s².