In order to change the momentum of an objective there must be:
Correct answer: A. A force applied
- A. A force applied
- B. A change in time
- C. A change in distance
- D. A change in temperature
Explanation
Fact. According to Newton's second law of motion, force is the rate of change of momentum i.e: F = d p/dt And hence a force acting for a given amount of time will change an object's momentum. Put another way, an unbalanced force always accelerates an object - either speeding it up or slowing it down.
Last updated
About Linear Momentum
Linear momentum is the vector product of mass and velocity, p = mv, and changes when a net external force acts. Work includes impulse as the change in momentum, conservation of momentum in isolated systems, collisions and explosions, and the distinction between elastic, inelastic and perfectly inelastic collisions.
Practise Force and Motion
1,416 free Force and Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 15 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2 bodies having K.E in ratio 4:1 and masses in ration 1:4 have linear momentum in ratio?
A 2N force acts on a mass. If the momentum of the mass changes by 120kg m/sec then the force acts for a time of:
A bullet is fired from a short gun to shoot a bag of sand. It hits the bag and goes through it.In the given situation, when the builet hits the bag of sand, the total momentum of the bullet
A bullet of mass 20g leaves the gun with a velocity of 200 m/s. If the mass of gun is 2kg then the speed of recoil of the gun is:
A cannon is placed on a smooth surface. When it fires a shell, the cannon moves backward. This recoil occurs due to: