According to Newton's first law of motion, an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. With zero net force acting on the object in both vertical and horizontal directions, its velocity (magnitude and direction) remains constant.
A person throws an object on a horizontal frictionless plane surface. It is noticed that there are two forces acting on this object—(i) gravitational pull and (ii) normal reaction of the surface. According to the third law of motion, the net resultant force is zero. Which one of the following can be said for the motion of the object?
Asked in UPSC CDS 2 2017 · Topic: Mechanics (Newton's Laws of Motion and their applications)
More Physics questions
- A particle moves with uniform acceleration along a straight line from rest. The percentage increase in displacement during sixth second compared to that in fifth second is about
- The position vector of a particle is r⃗ = 2t2 x̂ + 3t ŷ + 4 ẑ. Then the instantaneous velocity v and acceleration a⃗ respectively lie
- Two persons are holding a rope of negligible mass horizontally. A 20 kg mass is attached to the rope at the midpoint; as a result the rope deviates from the horizontal direction. The tension required to completely straighten the rope is (g = 10 m/s2)
- The direction of magnetic field at any location on the earth's surface is commonly specified in terms of
- A car undergoes a uniform circular motion. The acceleration of the car is
- If an object is at rest, then the time (X-axis) versus distance (Y-axis) graph
- An athlete completes one round of a circular track of diameter 100 m in 20 s. What will be the displacements after 1 minute and 10 s, respectively ?
- A bus starting from a bus-stand and moving with uniform acceleration attains a speed of 20 km/h in 10 minutes. What is its acceleration?