Determine the object’s original velocity by dividing the time it took for the object to travel a given distance by the total distance. In the equation V = d/t, V is the velocity, d is the distance, and t is the time.

What is an example of work in physics class 9?

For example : A bullock pulling a cart. The cart moves. The bullock pulls the cart with a force which moves the cart in the direction of force and hence the work is said to be done.

What are the 3 formulas for velocity?

v = u + at.
v² = u² + 2as.
s = ut + ½at²

What are the 4 formulas for velocity?

Variable	Equation
Velocity	v=u+at
Displacement with positive acceleration	s=ut+21at2
Displacement knowing initial and final velocities	s=21(u+v)t
Velocity squared	v2=u2+2as

What is the symbol for initial velocity?

Initial velocity refers to the velocity in the beginning when the object starts moving. When the time is equal to 0 seconds the velocity is called initial velocity. To denote initial velocity, we use the symbol ‘u’.

What is energy formula?

E = w + q. Energy also falls into two general types: (1) Kinetic Energy (EK)or the energy of motion: 1/2 mv2 where m is mass and v is velocity. (2) Potential Energy(EP): the energy stored in chemical bonds that is released when a bond is broken or formed.

What is work called in physics?

Work is the transfer of energy by a force acting on an object as it is displaced. The work that a force does on an object is the product of the magnitude of the force, times the magnitude of the displacement, times the cosine of the angle between them. In symbols, The SI unit for work and energy is the joule (J), where.

What is SI unit of work?

The SI unit of work is joule (J). Joule is defined as the work done by a force of one newton causing a displacement of one meter. Sometimes, newton-metre (N-m) is also used for measuring work.

What is V in physics?

v = velocity r = radius T = period This formula gives the veloc- ity v of an object moving once around a circle of radius r in time T (the period).

What does s stand for in physics?

Distance in physics is understood as the speed of an object multiplied by the total time taken by the object to travel the length of its path. When calculating the distance formula, d represents distance, s represents speed, and t represents time.

What does the U mean in physics?

The letter u is used in physics to denote the sign of potential energy, as well as the initial velocity and the object distance in ray optics.

What is the work done to increase the velocity of a car from 30 to 60?

According to the Work-Energy theorem or the relation between Kinetic energy and Work done – the work done on an object is the change in its kinetic energy. Hence, the work to be done to increase the velocity of a car from 30km/h to 60km/h is 156250 joule, if the mass of the car is 1500 kg.

What is the work done to increase the velocity of a car from 36 km per hour to 72 km per hour if mass of the car is 1500 kg?

To find, Work done to increase the velocity of a car from 36 km/h to 72 km/h if the mass of the car is 1500 kg. Hence, the work done to increase the velocity of a car from 36 km/h to 72 km/h, if the mass of the car is 1500 kg is 225000 Joule.

What is the work done in increasing the velocity of a car from 18 km per hour to 90 km per hour if mass of the car is 2000 kg?

Solution: The work done to increase the velocity of a car from 18 km/h to 90 km/h, if the mass of the car is 2000 kg is 6 × 105 J.

How much work is required to accelerate a 1000 kg car from 20 ms to 30 ms?

The work required to accelerate a 1000 kg car from 20 m/s to 30 m/s is equal to 250,000 joules.

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What is the work done to increase the velocity of a car from 30 km per hour to 60 km per hour if the mass of a car is 1500 kg?

What is the formula for the velocity of a car?