Newtons Laws 01

Newtons Laws 01

Assessment

Flashcard

Physics

12th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

Which of the following is not one of Newton’s laws of motion?

  • The total momentum of a system of interacting bodies remains constant, providing no external force acts.
  • The rate of change of momentum of a body is directly proportional to the external force acting on the body and takes place in the direction of the force.
  • If a body A exerts a force on body B, then body B exerts an equal and oppositely-directed force on body A.
  • A body continues in a state of rest or of uniform motion in a straight line unless acted upon by some external force.
  • For every action, there is an equal and opposite reaction.

Back

The total momentum of a system of interacting bodies remains constant, providing no external force acts.

2.

FLASHCARD QUESTION

Front

An aircraft is flying straight horizontal line with constant velocity relative to the ground. What is the resultant force acting on the aircraft?

Back

zero.

3.

FLASHCARD QUESTION

Front

A parachutist of mass 80 kg is descending at a constant velocity of 3.0 m s-1. What is the resultant force acting on the parachutist?

Back

zero.

4.

FLASHCARD QUESTION

Front

Position of pendulum bob when train starts moving with constant velocity?

Back

Remains over the mark because the motion of the train produces no additional force on the bob.

5.

FLASHCARD QUESTION

Front

A helicopter of mass 3000 kg is rising vertically with a constant velocity of 25 m s‑1. What is the resultant force acting on the helicopter?

Back

zero

6.

FLASHCARD QUESTION

Front

A tractor of mass 1000 kg tows a trailer of mass 1000 kg. The total resistance to the motion is 4000 N and one-quarter of this resistance acts on the trailer. The tractor and trailer are moving with a constant speed of 6 m s-1. What is the force exerted on the tractor by the tow bar?

Back

1000 N

7.

FLASHCARD QUESTION

Front

Which of the following statements best describes the weight of an object?

Back

the gravitational force acting on the object.

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