Physics-

General

Easy

Question

# A 10 kg brick moves along an -axis. Its acceleration as a function of its position is shown in figure. What is the net work performed on the brick by the force causing the acceleration as the brick moves from to m?

- 4 J
- 8 J
- 2 J
- 1 J

## The correct answer is: 8 J

### According to the graph the acceleration varies linearly with the coordinate . We may write , where is the slope of the graph.

From the graph

The force on the brick is in the positive -direction and according to Newton’s second law, its magnitude is given by

If is the final coordinate, the work done by the force is

### Related Questions to study

physics-

### Force on a particle moving in a straight line varies with distance as shown in the figure. The work done on the particle during its displacement of

### Force on a particle moving in a straight line varies with distance as shown in the figure. The work done on the particle during its displacement of

physics-General

physics-

### The potential energy of a system is represented in the first figure. The force acting on the system will be represented by

### The potential energy of a system is represented in the first figure. The force acting on the system will be represented by

physics-General

physics-

### The work done by force acting on a body is as shown in the graph. The total work done in covering an initial distance of 20 m is

### The work done by force acting on a body is as shown in the graph. The total work done in covering an initial distance of 20 m is

physics-General

physics-

### Two rectangular blocks and of masses 2kg and 3 kg respectively are connected by spring of spring constant 10.8 and are placed on a frictionless horizontal surface. The block was given an initial velocity of 0.15 in the direction shown in the figure. The maximum compression of the spring during the motion is

### Two rectangular blocks and of masses 2kg and 3 kg respectively are connected by spring of spring constant 10.8 and are placed on a frictionless horizontal surface. The block was given an initial velocity of 0.15 in the direction shown in the figure. The maximum compression of the spring during the motion is

physics-General

physics-

### Six identical balls are linked in a straight groove made on a horizontal frictionless surface as shown. Two similar balls each moving with a velocity collide elastically with the row of 6 balls from left. What will happen

### Six identical balls are linked in a straight groove made on a horizontal frictionless surface as shown. Two similar balls each moving with a velocity collide elastically with the row of 6 balls from left. What will happen

physics-General

physics-

### A force acting on an object varies with distance as shown here. The force is in and in . The work done by the force in moving the object from to is

### A force acting on an object varies with distance as shown here. The force is in and in . The work done by the force in moving the object from to is

physics-General

physics-

### What is the velocity of the bob of a simple pendulum at its mean position, if it is able to rise to vertical height of (Take )

### What is the velocity of the bob of a simple pendulum at its mean position, if it is able to rise to vertical height of (Take )

physics-General

physics-

### The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant k and compresses it by length L. The maximum momentum of the block after collides is

### The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant k and compresses it by length L. The maximum momentum of the block after collides is

physics-General

physics

### The area covered by the curve of V-t graph and time axis is equal to magnitude of

### The area covered by the curve of V-t graph and time axis is equal to magnitude of

physicsGeneral

physics-

### In a children’s park, there is a slide which has a total length of 10 m and a height of 8.0 m. A vertical ladder is provided to reach the top. A boy weighing 200 N climbs up the ladder to the top of the slide and slides down to the ground. The average friction offered by the slide is three-tenth of his weight. The work done by the slide on the boy as he comes down is

### In a children’s park, there is a slide which has a total length of 10 m and a height of 8.0 m. A vertical ladder is provided to reach the top. A boy weighing 200 N climbs up the ladder to the top of the slide and slides down to the ground. The average friction offered by the slide is three-tenth of his weight. The work done by the slide on the boy as he comes down is

physics-General

physics-

### A mass ‘m’ moves with a velocity 'v’ and collides in elastically with another identical mass. After collision the Ist mass moves with velocity in a direction perpendicular to the initial direction of motion. Find the speed of the 2^{nd} mass after collision

### A mass ‘m’ moves with a velocity 'v’ and collides in elastically with another identical mass. After collision the Ist mass moves with velocity in a direction perpendicular to the initial direction of motion. Find the speed of the 2^{nd} mass after collision

physics-General

physics-

### A toy car of mass 5 kg moves up a ramp under the influence of force plotted against displacement . The maximum height attained is given by

### A toy car of mass 5 kg moves up a ramp under the influence of force plotted against displacement . The maximum height attained is given by

physics-General

physics

### In uniformly accelerated motion the slope of velocity - time graph gives ....

### In uniformly accelerated motion the slope of velocity - time graph gives ....

physicsGeneral

physics

### The graph of displacement (x) time (t) for an object is given in the figure. In which part of the graph the acceleration of the particle is positive ?

### The graph of displacement (x) time (t) for an object is given in the figure. In which part of the graph the acceleration of the particle is positive ?

physicsGeneral

physics

### In the above figure acceleration (a) time (t) graph is given. Hence

### In the above figure acceleration (a) time (t) graph is given. Hence

physicsGeneral