Question

physics
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define the following :​

Answer 1

Answer:

4a) Velocity is the speed of something in a given direction.

b) Work is defined as a force causing the movement—or displacement—of an object.

c) Calorie is the energy needed to raise the temperature of 1 gram of water through 1 °C (now usually defined as 4.1868 joules).

Answer 2

Answer:

1. velocity : The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion.
2. work: Work is defined as a force acting upon an object to cause a displacement. It is expressed as the product of force and displacement in the direction of force.
3. calorie: calorie is a unit of energy. When you hear something contains 100 calories, it's a way of describing how much energy your body could get from eating or drinking it.