Two bodies A and B are approaching towards each other with speed 10 m/s and 54 km/hr. If the direction of motion of A is taken positive, then what is the relative velocity of B w.r.t. A?

Solution

Here,
$V e l o c i t y space o f space b o d y space A comma space stack straight v subscript straight A with rightwards arrow on top space equals space 10 straight m divided by straight s V e l o c i t y space o f space b o d y space B comma space stack straight v subscript straight B with rightwards arrow on top space equals space minus 54 space km divided by hr space equals space minus 15 straight m divided by straight s$
∴
Relative velocity is given by,
$space stack straight v subscript straight r with rightwards arrow on top equals stack straight v subscript straight B with rightwards arrow on top space minus space stack straight v subscript straight A with rightwards arrow on top space equals space minus 15 minus 10 equals negative 25 straight m divided by straight s$

Some More Questions From Motion in A Plane Chapter

Pick out the only vector quantities in the following list:
Temperature, pressure, impulse, time, power, total path length, energy, gravitational potential, coefficient of friction and charge.

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Motion In A Plane

Two bodies A and B are approaching towards each other with speed 10 m/s and 54 km/hr. If the direction of motion of A is taken positive, then what is the relative velocity of B w.r.t. A?

Some More Questions From Motion in A Plane Chapter

What is a scalar quantity?

What is a vector quantity?

Give three examples of scalar quantities.

Give three examples of vector quantities.

What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

Is a physical quantity, having a direction, necessarily a vector?

Name a quantity which is both scalar as well as vector.

Which of the followings is/are vector quantities: work, power, acceleration, mass, momentum?

Pick up the odd one from the following: force, linear momentum, mass, impulse.

Pick out the only vector quantities in the following list:
Temperature, pressure, impulse, time, power, total path length, energy, gravitational potential, coefficient of friction and charge.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

Motion In A Plane

Two bodies A and B are approaching towards each other with speed 10 m/s and 54 km/hr. If the direction of motion of A is taken positive, then what is the relative velocity of B w.r.t. A?

Some More Questions From Motion in A Plane Chapter

What is a scalar quantity?

What is a vector quantity?

Give three examples of scalar quantities.

Give three examples of vector quantities.

What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

Is a physical quantity, having a direction, necessarily a vector?

Name a quantity which is both scalar as well as vector.

Which of the followings is/are vector quantities: work, power, acceleration, mass, momentum?

Pick up the odd one from the following: force, linear momentum, mass, impulse.

Pick out the only vector quantities in the following list:Temperature, pressure, impulse, time, power, total path length, energy, gravitational potential, coefficient of friction and charge.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Pick out the only vector quantities in the following list:
Temperature, pressure, impulse, time, power, total path length, energy, gravitational potential, coefficient of friction and charge.