science
Grade-9
Easy
Question
A stone is thrown upwards. It moves upwards for some time and then starts falling down. The velocity that the stone has just before touching the ground is ___.
- Minimum
- Maximum
- Zero
- Can be anything
Hint:
When the object started to fall down it will experience acceleration due to gravity.
The correct answer is: Maximum
A stone is thrown upwards. It moves upwards for some time and then starts falling down. The velocity that the stone has just before touching the ground is Maximum.
When the stone started to fall down the potential energy also started to decrease as the height is decreasing, with the decrease in potential energy the kinetic energy increases, and when the stone is just about to touch the ground it possess maximum velocity and kinetic energy.
Related Questions to study
science
An object is moving at some velocity increases its speed later. The y-intercept of its v-t graph is ___.
An object is moving at some velocity increases its speed later. The y-intercept of its v-t graph is ___.
scienceGrade-9
science
The acceleration of the body whose v-t graph is given below is ____ m/s2.
The acceleration of the body whose v-t graph is given below is ____ m/s2.
scienceGrade-9
science
Which of the following quantities cannot be calculated by directly using the second equation of motion?
Which of the following quantities cannot be calculated by directly using the second equation of motion?
scienceGrade-9
science
The area under the v-t graph represents the ____ of the moving body.
The area under the v-t graph represents the ____ of the moving body.
scienceGrade-9
science
In a mathematical problem, Samuel was provided with the values of s, u, and a and the value of t was asked to be calculated. Samuel substituted those values into the second equation of motion and got a quadratic equation in t as a result. He thought of plotting a graph taking t in the x-axis. How will the graph look like?
In a mathematical problem, Samuel was provided with the values of s, u, and a and the value of t was asked to be calculated. Samuel substituted those values into the second equation of motion and got a quadratic equation in t as a result. He thought of plotting a graph taking t in the x-axis. How will the graph look like?
scienceGrade-9
science
A ball is thrown upwards, the velocity of the ball when it reaches the maximum height is ___.
A ball is thrown upwards, the velocity of the ball when it reaches the maximum height is ___.
scienceGrade-9
science
In a running race between 4 people, the 2nd person started running few seconds earlier than the rest. The x-intercept of the v-t graph of the 2nd person is ___.
In a running race between 4 people, the 2nd person started running few seconds earlier than the rest. The x-intercept of the v-t graph of the 2nd person is ___.
scienceGrade-9
science
An object starts from rest. The y-intercept of its v-t graph is ___
An object starts from rest. The y-intercept of its v-t graph is ___
scienceGrade-9
science
The displacement of the body whose v-t graph is given below is ____ m.
The displacement of the body whose v-t graph is given below is ____ m.
scienceGrade-9
science
A ball is dropped from the top of a building of height 80 m. Considering the acceleration due to gravity of the Earth to be 10 m/s2, the velocity of the ball right before it touches the ground is ____ m/s.
A ball is dropped from the top of a building of height 80 m. Considering the acceleration due to gravity of the Earth to be 10 m/s2, the velocity of the ball right before it touches the ground is ____ m/s.
scienceGrade-9
science
A car moving at a velocity of 5 m/s accelerates to 25 m/s while covering a distance of 1.8 km. The acceleration of the car is ___ m/s2.
A car moving at a velocity of 5 m/s accelerates to 25 m/s while covering a distance of 1.8 km. The acceleration of the car is ___ m/s2.
scienceGrade-9
science
The acceleration of the body whose v-t graph is given below is ____ m/s2.
The acceleration of the body whose v-t graph is given below is ____ m/s2.
scienceGrade-9
science
Which of the following quantities cannot be calculated by directly using the third equation of motion?
Which of the following quantities cannot be calculated by directly using the third equation of motion?
scienceGrade-9
science
Which of the following quantities does the first equation of motion not have?
Which of the following quantities does the first equation of motion not have?
scienceGrade-9
science
A ball is thrown upwards. If the reference direction is taken to be downwards, the acceleration of the ball is ___ m/s2.
A ball is thrown upwards. If the reference direction is taken to be downwards, the acceleration of the ball is ___ m/s2.
scienceGrade-9
