Question # 1

The motion of a projectile is

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one dimension

two dimension

three dimension

all of them

Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?

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Their range will be same

Their maximum height will be same

Their landing velocity will be same

Their time of flight will be same

Graphs which are used to illustrate the variation of velocity of an object with time are called

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distance time graphs

speed time graphs

velocity time graphs

acceleration time graphs

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

Which of the following is not a projectile

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a bullet fired from a gun

a space ship

a football in air

an artillery shell

To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined

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Parallel

Antiparallel

At angle 60°

Perpendicular to each other

Newton's first law is also called:

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Law of torque

Law of force

Law of inertia

None of these

One KWh is equal to:

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3.6 x 10²J

3.6 KJ

3,6 x 10¹KJ

3,6 MJ

Inertia mass and gravitational mass are

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opposite

identical

identical when there is no friction

all of them

Flight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

Laws of motion are not valid in a system which is

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inertial

non-interial

at rest

moving with uniform velocity

The displacement coincides with the path of the motion when a body moves is a

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curved line

straight line

may be curved or straight

none of them

A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is

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60 kg wt

72 kg wt

48 kg wt

Zero

A typical rocket ejects the burnt gases at speeds over

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400 ms^-1

40000m s^-1

40000 ms^-1

60000 ms^-1

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?

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60 km/hr

80 km/hr

120 km/hr

180 km/hr

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ECAT Physics Chapter 3 Motion and Force Online Test MCQs With Answers

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