What is meant by resistive force?How to find the total resistive force in velocity time graph at certain time if weight of body is given?
inertia?
the slope of the velocity-time graph is the acceleration
f = m a
Resistive force (also known as frictional force) is a force that opposes the motion of an object. It's the force that acts in the opposite direction to the object's velocity and decreases its speed or brings it to a stop.
To find the total resistive force in a velocity-time graph at a certain time, given the weight of the body, you need to follow these steps:
1. Identify the time at which you want to find the resistive force on the velocity-time graph.
2. Determine the velocity of the object at that specific time. You can do this by locating the point on the graph that corresponds to the desired time and noting the velocity value.
3. Calculate the acceleration of the object at that time using the slope of the velocity-time graph. The slope represents the rate of change of velocity with respect to time. The formula for acceleration is "acceleration = change in velocity / change in time."
4. Determine the resistive force acting on the object using Newton's second law of motion, which states that force equals mass times acceleration. The formula for force is "force = mass x acceleration."
5. Substitute the known weight of the body for the mass in the equation (since weight is equal to mass multiplied by the acceleration due to gravity) and calculate the resistive force.
Remember that if the object is moving in a straight line with a constant velocity, there is no resistive force acting on it. The resistive force only comes into play when there is relative motion or an object is subjected to a resisting medium like friction or air resistance.