Physics-
General
Easy
Question
A point-like object of mass 2.0 kg moves along the x-axis with a velocity of + 4.0 m/s. A net horizontal force acting along the x-axis is applied to the object with the force-time profile shown. What is the total work that was done by the force?
- 20 J
- 25 J
- 65 J
- 81 J
The correct answer is: 20 J
Related Questions to study
physics-
Consider the cyclic process ABCA shown in figure, performed on a sample of 1 mole of an ideal gas. A total of 1000 J of heat is withdrawn from the sample in the process, the work done on the gas during part BC is 1830 J, the value of 
Consider the cyclic process ABCA shown in figure, performed on a sample of 1 mole of an ideal gas. A total of 1000 J of heat is withdrawn from the sample in the process, the work done on the gas during part BC is 1830 J, the value of
physics-General
physics-
A rubber ball bounces on the ground as shown. After each bounce, the ball reaches one-half the highest of the bounce before it. If the time the ball was in the air between the first and second bounce was 1 second, what would be the time between the second and third bounce?
A rubber ball bounces on the ground as shown. After each bounce, the ball reaches one-half the highest of the bounce before it. If the time the ball was in the air between the first and second bounce was 1 second, what would be the time between the second and third bounce?
physics-General
physics-
The diagram shows a uniformly charged hemisphere of radius R. It has volume charge density r. If the electric field at a point 2R distance above its center is E then what is the electric field at the point which is 2R below its center?
The diagram shows a uniformly charged hemisphere of radius R. It has volume charge density r. If the electric field at a point 2R distance above its center is E then what is the electric field at the point which is 2R below its center?
physics-General
physics-
The field line to the right is a field line of the electric field, then its representation can be
The field line to the right is a field line of the electric field, then its representation can be
physics-General
physics-
In frame I, two identical conducting spheres, A and B, carry equal amounts of excess charge that have the same sign. The spheres are separated by a distance d; and sphere A exerts an electrostatic force on sphere B which has a magnitude F. A third sphere, C, which is handled only by an insulated rod, is introduced in frame II. Sphere C is identical to A and B except that it is initially uncharged. Sphere C is touched first to sphere A, in frame II, and then to sphere B, in frame III, and is finally removed in frame IV.
Determine the magnitude of the electrostatic force that sphere A exerts on sphere B in frame IV
In frame I, two identical conducting spheres, A and B, carry equal amounts of excess charge that have the same sign. The spheres are separated by a distance d; and sphere A exerts an electrostatic force on sphere B which has a magnitude F. A third sphere, C, which is handled only by an insulated rod, is introduced in frame II. Sphere C is identical to A and B except that it is initially uncharged. Sphere C is touched first to sphere A, in frame II, and then to sphere B, in frame III, and is finally removed in frame IV.
Determine the magnitude of the electrostatic force that sphere A exerts on sphere B in frame IV
physics-General
physics-
For the biprism experiment shown in the figure, the fringe width increases when
For the biprism experiment shown in the figure, the fringe width increases when
physics-General
physics-
In a Young's double–slit experiment, if the slits are of unequal width,
In a Young's double–slit experiment, if the slits are of unequal width,
physics-General
physics-
Which of the following is the equation of a spherical wave
Which of the following is the equation of a spherical wave
physics-General
physics-
are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through 
and perpendicular to the line joining 
, if the frequency of both the sources is:
are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through and perpendicular to the line joining , if the frequency of both the sources is:
physics-General
physics-
A string consists of two parts attached at x = 0. The right part of the string (x > 0) has mass mr per unit length and the left part of the string (x < 0) has mass 
per unit length. The string tension is T. If a wave of unit amplitude travels along the left part of the string, as shown in the figure, what is the amplitude of the wave that is transmitted to the right part of the string?
A string consists of two parts attached at x = 0. The right part of the string (x > 0) has mass mr per unit length and the left part of the string (x < 0) has mass per unit length. The string tension is T. If a wave of unit amplitude travels along the left part of the string, as shown in the figure, what is the amplitude of the wave that is transmitted to the right part of the string?
physics-General
physics-
Two graphs of the same harmonic wave are shown below. The graph (1) on the left shows the displacement of wave y, as a function of position x for a given instant of time. The graph (2) on the right shows the displacement of wave as a function ot time 't' for a given position. The speed of the wave is
Two graphs of the same harmonic wave are shown below. The graph (1) on the left shows the displacement of wave y, as a function of position x for a given instant of time. The graph (2) on the right shows the displacement of wave as a function ot time 't' for a given position. The speed of the wave is
physics-General
physics-
The prong of a electrically operated tuning fork is connected to a long string of 
and tension 25 N. The maximum velocity of the prong is 1 cm/s, then the average power needed to drive the prong is:
The prong of a electrically operated tuning fork is connected to a long string of and tension 25 N. The maximum velocity of the prong is 1 cm/s, then the average power needed to drive the prong is:
physics-General
physics-
A compound pendulum is constructed by taking a thin, uniform circular ring of mass m and radius R and affixing a straight, thin uniform rod of mass m and length 2R across one of its diameter as shown in the diagram .
A compound pendulum is constructed by taking a thin, uniform circular ring of mass m and radius R and affixing a straight, thin uniform rod of mass m and length 2R across one of its diameter as shown in the diagram .
physics-General
physics-
The light pulley hangs from the ceiling on a spring with a force constant k. The block “m” hangs from an ideal string.
The light pulley hangs from the ceiling on a spring with a force constant k. The block “m” hangs from an ideal string.
physics-General
physics-
A uniform rod of mass m suspended by two identical threads l in length (see figure) was turned through a small angle about the vertical axis passing through its middle point C. The threads deviated in the process through a small angle a Then the rod was released to start performing small oscillations. The rod's oscillation energy is
A uniform rod of mass m suspended by two identical threads l in length (see figure) was turned through a small angle about the vertical axis passing through its middle point C. The threads deviated in the process through a small angle a Then the rod was released to start performing small oscillations. The rod's oscillation energy is
physics-General
