negative
The correct answer is negative.
Work done is defined as the dot product of force and displacement: \(W = \vec{F} \cdot \vec{d} = Fd \cos\theta\), where \(\theta\) is the angle between the force and displacement vectors.
When a ball is thrown upwards, the gravitational force acts downwards (towards the earth). The displacement of the ball is upwards. Therefore, the angle \(\theta\) between the force and displacement vectors is 180 degrees.
Since \( \cos(180^\circ) = -1 \), the work done by the gravitational force is negative. The gravitational force is acting in the opposite direction to the displacement of the ball, thus reducing the ball's kinetic energy. This negative work is converted into potential energy as the ball rises.
Similar Questions
- If a force of 6 N is applied on a body, which is displaced through 2 m in the direction of the force, the work done is found to be _______.
- Which of the following options represents the equation for work done?
Work done will be maximum when the angle between the direction of force and the direction of direction of displacement is
Important Questions from Work
A body of mass 100 kg rests on a horizontal plane, the value of coefficient of friction between the body and plane being 0.025. Find the work done in moving the body through a distance of 10 metres along the plane.
A load of 16.5 kg is lifted through a height of 3.4 metres. Find the work done in kg metre.
______ efforts are where our eyes direct the movement of our bodies.
Task simplifications represent _______ work methods.
The energy equivalence of 1 eV is
