9th Class Physics Chapter 4 Online MCQ Test With Answers PDF English Medium (Turning Effect of Forces)

Physics 9th Class English Medium Unit 4 Online Test

Sr. #	Questions	Answers Choice
1	A setallite of mass 'm' is revolving around the earth with an orbital speed 'v' If mass of the satellite is doubled, its orbital speed will become.	Double Half One fourth Remain the same
2	A car drives at steady speed around a perfectly circular track	The car's acceleration is zero The net force on the car is zero Both the aceleerain and net force n the the car point inward Both the accelerationand net fore on the the car point outward
3	The reason that a car movint on a horizontal road gets thrown out of the road while taking a turn is.	The reaction of ground Rolling friction between tyre and road Lack of sufficient centriptal force Gravitational force
4	The force that alwyas changes directron of velocity and not its magnitude tis called.	Electrical force Centripetal force Gravitational force Friction
5	The correct order of comparison for the terminal speeds of a raindrop snowflake, and hailstone is.	Raindrop= Snowflake = Hailstone Rindrop>Snow flake>Hailstone Hailstone>SRaindrop>Snowflake Snowflake>FRaindrop>Hailstone
6	For an objec moving with terminal velociyt, its acceleration.	First increasse than decreases Is zero Increass with time Decrease with time
7	It is more difficult to walk on a slippery surface than on a nonslipery one because of	Lower weight Increased friction Reduced friction High grip
8	You throw a ,it opens fully underwater, spreading out its mesh evenly.Compared to the moment it left your hand, where in the net\s center of mass now.	Unchanged from its position when thrown At the same depth but slightly shifted horizontally Higher is the water column Loweer in the water column
9	A tightropw walker is carrying a long pole while walking across a rope The stability of the walker is affected if the pole is	Short and placed horizontally Long and placed horizontally Short and placed vertically Long and placed vertically
10	A uniformly rotating fan is said to be in	Static equilibrium only Dynamic equilibrium only Boh in static and dynamic equilibrium Not in equilibrium
11	A body in equilibrium must not have	Speed Velocity Acceleeration Quantity of motion
12	You are trying to loosen a nut using a spanner, but it is not working In order to open the nut, you need to.	Use plastic and soft spanner Use a spanner of small length Insert a pipe to increase length of spanner Tie a rope with spanner

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