## For any arbitrary motion in space, which of the following relations are true : (a) vaverage = (1/2) (v (t1) + v (t2)) (b) vaverage = [ r(t2) – r(t1) ] / (t2 – t1) (c) v (t) = v (0) + a t (d) r (t) = r (0) + v (0) t + (1/2) a t2 (e) aaverage = [ v (t2) – v (t1 ) ] / ( t2 – t1) (The ‘average’ stands for average of the quantity over the time interval t1 to t2) | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

Q.23:- For any arbitrary motion in space, which of the following relations are true : (a) vaverage = (1/2) (v (t1) + v (t2)) (b) vaverage = [ r(t2) – r(t1) ]…

## î and ĵ are unit vectors along x and y axis respectively. What is the magnitude and direction of the vectors î + ĵ, and î − ĵ ? What are the components of a vector A= 2î + 3ĵ along the directions of î + ĵ and î − ĵ? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

Q.22:- î and ĵ are unit vectors along x and y axis respectively. What is the magnitude and direction of the vectors î + ĵ, and î − ĵ ? What are the components of a vector A= 2î + 3ĵ along the directions of î + ĵ and î − ĵ? [You…

## A particle starts from the origin at t = 0 s with a velocity of 10.0 ĵ m/s and moves in the x-y plane with a constant acceleration of (8.0 î+ 2.0 ĵ) m s-2. (a) At what time is the x- coordinate of the particle 16 m? What is the y-coordinate of the particle at that time? (b) What is the speed of the particle at the time? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

Q.21:- A particle starts from the origin at t = 0 s with a velocity of 10.0 ĵ m/s and moves in the x-y plane with a constant acceleration of (8.0…

## The position of a particle is given by where t is in seconds and the coefficients have the proper units for r to be in metres. (a) Find the v and a of the particle? (b) What is the magnitude and direction of velocity of the particle at t = 2.0 s ? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

Q.20:- The position of a particle is given by where t is in seconds and the coefficients have the proper units for r to be in metres. (a) Find the v…

## Read each statement below carefully and state, with reasons, if it is true or false: (a) The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre (b) The velocity vector of a particle at a point is always along the tangent to the path of the particle at that point (c) The acceleration vector of a particle in uniform circular motion averaged over one cycle is a null vector | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

Q.19:- Read each statement below carefully and state, with reasons, if it is true or false: (a) The net acceleration of a particle in circular motion is always along the radius…

## An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its centripetal acceleration with the acceleration due to gravity. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

Q.18:- An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its centripetal acceleration with the acceleration due to gravity.   Answer:- Radius…

## A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

Q.17:- A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25…

## A cricketer can throw a ball to a maximum horizontal distance of 100 m. How much high above the ground can the cricketer throw the same ball? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

Q.16:- A cricketer can throw a ball to a maximum horizontal distance of 100 m. How much high above the ground can the cricketer throw the same ball ?   Answer:-…