science
Grade-9
Easy
Question
In which of the following cases are the equations of motion not valid?
- The motion of a ball thrown upwards
- An athlete moving on a circular path
- A car moving on a straight road at constant acceleration
- A car moving on a straight road at constant velocity
The correct answer is: An athlete moving on a circular path
- The equations of motion are only valid for straight line motion(linear motion)
Related Questions to study
science
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.
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.
scienceGrade-9
science
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 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 _____.
scienceGrade-9
science
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 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 _____.
scienceGrade-9
science
A bus starts from rest and attains a velocity of 30 m/s in 5 s. Its acceleration is ____ m/s2.
A bus starts from rest and attains a velocity of 30 m/s in 5 s. Its acceleration is ____ m/s2.
scienceGrade-9
science
The area under a v-t graph gives the _____ of the body.
The area under a v-t graph gives the _____ of the body.
scienceGrade-9
science
Which of the following is called the velocity-time relation?
Which of the following is called the velocity-time relation?
scienceGrade-9
science
A body is thrown vertically upwards. It’s acceleration ___ as it reaches the maximum height.
A body is thrown vertically upwards. It’s acceleration ___ as it reaches the maximum height.
scienceGrade-9
science
A car started from rest and increased its speed to 60 m/s in a minute. The acceleration of the car is ___ m/s2.
A car started from rest and increased its speed to 60 m/s in a minute. The acceleration of the car is ___ m/s2.
scienceGrade-9
science
In which of the following cases can the equations of motion not be applied?
In which of the following cases can the equations of motion not be applied?
scienceGrade-9
science
A body is in a uniform circular motion. The equations of motion are _____.
A body is in a uniform circular motion. The equations of motion are _____.
scienceGrade-9
science
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.
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.
scienceGrade-9
Negative acceleration is known as deceleration.
science
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 bus starts from rest and keeps increasing its speed by 3 m/s every second. It covers a distance of ____ in 20 s.
scienceGrade-9
science
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 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.
scienceGrade-9
science
A biker starts from rest and attains a velocity of 10 m/s in 5 s. Her acceleration is ____ m/s2.
A biker starts from rest and attains a velocity of 10 m/s in 5 s. Her acceleration is ____ m/s2.
scienceGrade-9
science
A vehicle’s displacement increases by 4 m every second. What does it mean?
A vehicle’s displacement increases by 4 m every second. What does it mean?
scienceGrade-9