science

Grade-9

Easy

Question

# 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 _____.

Hint:

### 60 m/s

## The correct answer is: 60

### Given that,

The initial velocity, u = 0

The acceleration, a = 3 m/s^{2}

Time taken, t = 20 s

On using the first equation of motion we get,

v = u + at

Or, v = 0 + 3 x 20

Or, v = 60 m/s

Therefore, the final velocity of the car is 60 m/s.

### Related Questions to study

science

### A vehicle moving at a speed of 12 m/s accelerates at a rate of 6 m/s^{2} 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/s^{2} 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/s^{2}.

### A bus starts from rest and attains a velocity of 30 m/s in 5 s. Its acceleration is ____ m/s^{2}.

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/s^{2}.

### A car started from rest and increased its speed to 60 m/s in a minute. The acceleration of the car is ___ m/s^{2}.

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/s^{2}.

### 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/s^{2}.

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

science

### An object’s velocity decreases by equal amounts in equal intervals of time. The object is in ____.

### An object’s velocity decreases by equal amounts in equal intervals of time. The object is in ____.

scienceGrade-9

science

### The acceleration of a body thrown upwards is ___.

### The acceleration of a body thrown upwards is ___.

scienceGrade-9

science

### An object comes to rest. It means that ___.

### An object comes to rest. It means that ___.

scienceGrade-9