Physics-

#### The resultant of two forces, one double the other in magnitude, is perpendicular to the smaller of the two forces. The angle between the two forces is -

Physics-General

#### Answer:The correct answer is:

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### Related Questions to study

physics-

#### A block of mass 2kg is free to move along the x- axis. It is at rest and from t=0 onwards it is subjected to a time-dependent force in the x- direction. The force varies with t as shown in the figure. The kinetic energy of the block after 4.5 seconds is

#### A block of mass 2kg is free to move along the x- axis. It is at rest and from t=0 onwards it is subjected to a time-dependent force in the x- direction. The force varies with t as shown in the figure. The kinetic energy of the block after 4.5 seconds is

physics-General

physics

#### In the above figure acceleration (a) time (t) graph is given. Hence

#### In the above figure acceleration (a) time (t) graph is given. Hence

physicsGeneral

physics

#### The graph of displacement (x) time (t) for an object is given in the figure. In which part of the graph the acceleration of the particle is positive ?

#### The graph of displacement (x) time (t) for an object is given in the figure. In which part of the graph the acceleration of the particle is positive ?

physicsGeneral

physics

#### In uniformly accelerated motion the slope of velocity - time graph gives ....

#### In uniformly accelerated motion the slope of velocity - time graph gives ....

physicsGeneral

physics-

#### A toy car of mass 5 kg moves up a ramp under the influence of force plotted against displacement . The maximum height attained is given by

Work done = Gain in potential energy

Area under curve

Area under curve

#### A toy car of mass 5 kg moves up a ramp under the influence of force plotted against displacement . The maximum height attained is given by

physics-General

Work done = Gain in potential energy

Area under curve

Area under curve

physics-

#### A mass ‘m’ moves with a velocity 'v’ and collides in elastically with another identical mass. After collision the Ist mass moves with velocity in a direction perpendicular to the initial direction of motion. Find the speed of the 2^{nd} mass after collision

Let mass moves with velocity and collides inelastically with mass which is at rest

According to problem mass moves in a perpendicular direction and let the mass moves at angle with the horizontal with velocity

Initial horizontal momentum of system

(before collision) ….(i)

Final horizontal momentum of system

(after collision) ….(ii)

From the conservation of horizontal linear momentum

…(iii)

Initial vertical momentum of system (before collision) is zero

Final vertical momentum of system

From the conservation of vertical linear momentum

…(iv)

By solving (iii) and (iv)

According to problem mass moves in a perpendicular direction and let the mass moves at angle with the horizontal with velocity

Initial horizontal momentum of system

(before collision) ….(i)

Final horizontal momentum of system

(after collision) ….(ii)

From the conservation of horizontal linear momentum

…(iii)

Initial vertical momentum of system (before collision) is zero

Final vertical momentum of system

From the conservation of vertical linear momentum

…(iv)

By solving (iii) and (iv)

#### A mass ‘m’ moves with a velocity 'v’ and collides in elastically with another identical mass. After collision the Ist mass moves with velocity in a direction perpendicular to the initial direction of motion. Find the speed of the 2^{nd} mass after collision

physics-General

Let mass moves with velocity and collides inelastically with mass which is at rest

According to problem mass moves in a perpendicular direction and let the mass moves at angle with the horizontal with velocity

Initial horizontal momentum of system

(before collision) ….(i)

Final horizontal momentum of system

(after collision) ….(ii)

From the conservation of horizontal linear momentum

…(iii)

Initial vertical momentum of system (before collision) is zero

Final vertical momentum of system

From the conservation of vertical linear momentum

…(iv)

By solving (iii) and (iv)

According to problem mass moves in a perpendicular direction and let the mass moves at angle with the horizontal with velocity

Initial horizontal momentum of system

(before collision) ….(i)

Final horizontal momentum of system

(after collision) ….(ii)

From the conservation of horizontal linear momentum

…(iii)

Initial vertical momentum of system (before collision) is zero

Final vertical momentum of system

From the conservation of vertical linear momentum

…(iv)

By solving (iii) and (iv)

physics-

#### In a children’s park, there is a slide which has a total length of 10 m and a height of 8.0 m. A vertical ladder is provided to reach the top. A boy weighing 200 N climbs up the ladder to the top of the slide and slides down to the ground. The average friction offered by the slide is three-tenth of his weight. The work done by the slide on the boy as he comes down is

or

#### In a children’s park, there is a slide which has a total length of 10 m and a height of 8.0 m. A vertical ladder is provided to reach the top. A boy weighing 200 N climbs up the ladder to the top of the slide and slides down to the ground. The average friction offered by the slide is three-tenth of his weight. The work done by the slide on the boy as he comes down is

physics-General

or

physics

#### The area covered by the curve of V-t graph and time axis is equal to magnitude of

#### The area covered by the curve of V-t graph and time axis is equal to magnitude of

physicsGeneral

physics-

#### The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant k and compresses it by length L. The maximum momentum of the block after collides is

Momentum would be maximum when KE would be maximum and this is the case when total elastic PE is converted KE.

According to conservation of energy

Or

According to conservation of energy

Or

#### The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant k and compresses it by length L. The maximum momentum of the block after collides is

physics-General

Momentum would be maximum when KE would be maximum and this is the case when total elastic PE is converted KE.

According to conservation of energy

Or

According to conservation of energy

Or

physics-

#### What is the velocity of the bob of a simple pendulum at its mean position, if it is able to rise to vertical height of (Take )

#### What is the velocity of the bob of a simple pendulum at its mean position, if it is able to rise to vertical height of (Take )

physics-General

physics-

#### A force acting on an object varies with distance as shown here. The force is in and in . The work done by the force in moving the object from to is

Work done = Area enclosed by graph

#### A force acting on an object varies with distance as shown here. The force is in and in . The work done by the force in moving the object from to is

physics-General

Work done = Area enclosed by graph

physics

#### Here is a velocity - time graph of a motorbike moving in one direction. Calculate the distance covered by it in last two seconds.

#### Here is a velocity - time graph of a motorbike moving in one direction. Calculate the distance covered by it in last two seconds.

physicsGeneral

physics

#### Here are the graphs of velocity time of two cars A and B, Find the ratio of the acceleration. after time t.

#### Here are the graphs of velocity time of two cars A and B, Find the ratio of the acceleration. after time t.

physicsGeneral

physics

#### The intercept of the velocity-time graph on the velocity axis gives.

#### The intercept of the velocity-time graph on the velocity axis gives.

physicsGeneral

physics

#### Slope of the velocity-time graph gives …….. of a moving body

#### Slope of the velocity-time graph gives …….. of a moving body

physicsGeneral