Which of the following statements are true in the real world scenario?
Statement 1: A uniform motion requires no net force.
Statement 2: In practical situation friction force is always zero.
Statement 3: Friction force acts opposite to the direction of relative motion.
Statement 4: Frictional force can be minimized by using rough surface.
Which of the following statements are true in the real world scenario?
Statement 1: A uniform motion requires no net force.
Statement 2: In practical situation friction force is always zero.
Statement 3: Friction force acts opposite to the direction of relative motion.
Statement 4: Frictional force can be minimized by using rough surface.
The correct option is C All statements are true except statement 2.
Statement 1 and 3 are true.
According to Newton's 1st law of motion, if no net force is acting on an object, the object will move constant velocity. Therefore, uniform motion does not need a net force.
The fundamental cause of the frictional force to arise is the interlocking between the surface irregularities. Since no surface can be smooth completely, the friction is not zero in practical scenarios.
Friction is a force that opposes the relative motion between two objects in contact. Therefore, friction always acts in the opposite direction of the relative motion.
On rough surfaces, the surface irregularities are more. As a result, the interlocking between the two surfaces increases. Hence, the friction is more on rough surfaces.
All statements are true except statement 2.
Statement 1 and 3 are true.
According to Newton's 1st law of motion, if no net force is acting on an object, the object will move constant velocity. Therefore, uniform motion does not need a net force.
The fundamental cause of the frictional force to arise is the interlocking between the surface irregularities. Since no surface can be smooth completely, the friction is not zero in practical scenarios.
Friction is a force that opposes the relative motion between two objects in contact. Therefore, friction always acts in the opposite direction of the relative motion.
On rough surfaces, the surface irregularities are more. As a result, the interlocking between the two surfaces increases. Hence, the friction is more on rough surfaces.
