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A body of mass 2kg is sliding with a constant velocity of 4m/s on a frictionless horizontal table. The net force required to keep the body moving with the same velocity is
- a)8N
- b)0N
- c)4N
- d)1/2 N
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
A body of mass2kgis sliding with a constant velocity of4m/son a fricti...
To understand why the net force required to keep the body moving with the same velocity is 0N, let's analyze the forces acting on the body.
1. Weight (mg):
The weight of the body is given by the mass (m) multiplied by the acceleration due to gravity (g). In this case, since the body is on a horizontal table, the weight acts vertically downward and has no effect on the horizontal motion. Therefore, we can ignore it for this analysis.
2. Normal Force (N):
The normal force is the force exerted by a surface to support the weight of an object resting on it. In this case, since the body is on a frictionless table, the normal force is equal in magnitude and opposite in direction to the weight (mg). As mentioned earlier, we can ignore the weight, so the normal force is also 0N.
3. Frictional Force (f):
Since the table is frictionless, there is no frictional force acting on the body. Therefore, we can ignore it as well.
4. Net Force (Fnet):
The net force is the vector sum of all the forces acting on the body. In this case, since there are no forces acting on the body (except the weight, which we have ignored), the net force is 0N.
Hence, the net force required to keep the body moving with the same velocity is 0N. This means that no additional force is required to maintain the constant velocity. The body will continue moving with the same velocity on the frictionless table without the need for any external force.
Therefore, the correct answer is option 'B' (0N).
1. Weight (mg):
The weight of the body is given by the mass (m) multiplied by the acceleration due to gravity (g). In this case, since the body is on a horizontal table, the weight acts vertically downward and has no effect on the horizontal motion. Therefore, we can ignore it for this analysis.
2. Normal Force (N):
The normal force is the force exerted by a surface to support the weight of an object resting on it. In this case, since the body is on a frictionless table, the normal force is equal in magnitude and opposite in direction to the weight (mg). As mentioned earlier, we can ignore the weight, so the normal force is also 0N.
3. Frictional Force (f):
Since the table is frictionless, there is no frictional force acting on the body. Therefore, we can ignore it as well.
4. Net Force (Fnet):
The net force is the vector sum of all the forces acting on the body. In this case, since there are no forces acting on the body (except the weight, which we have ignored), the net force is 0N.
Hence, the net force required to keep the body moving with the same velocity is 0N. This means that no additional force is required to maintain the constant velocity. The body will continue moving with the same velocity on the frictionless table without the need for any external force.
Therefore, the correct answer is option 'B' (0N).
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Community Answer
A body of mass2kgis sliding with a constant velocity of4m/son a fricti...
According to newton's first law of motion, an object either remains at rest or continues to move at a constant velocity, unless acted upon by an external net force.
Therefore The force required to keep the body moving with the same velocity is zero.
Therefore The force required to keep the body moving with the same velocity is zero.
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A body of mass2kgis sliding with a constant velocity of4m/son a frictionless horizontal table. The net force required to keep the body moving with the same velocity isa)8Nb)0Nc)4Nd)1/2 NCorrect answer is option 'B'. Can you explain this answer?
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