A 100g bird siis in its nest. what is the Fnet(net force) in this case?
To calculate the net force in this case, we need to consider the forces acting on the bird. The main forces involved are the gravitational force and the normal force.
1. Gravitational force: This force is the weight of the bird, which is equal to its mass multiplied by the acceleration due to gravity (9.8 m/s^2). Since the mass of the bird is 100g, we first convert it to kilograms by dividing by 1000: 100g ÷ 1000 = 0.1 kg. Therefore, the weight of the bird is 0.1 kg × 9.8 m/s^2 = 0.98 N acting downwards.
2. Normal force: The normal force is the force exerted by a surface to support the weight of an object resting on it. In this case, the bird is sitting in its nest, which means the normal force from the nest is equal in magnitude and opposite in direction to the gravitational force. So, the normal force will be 0.98 N but directed upwards.
Since the net force is the vector sum of all forces acting on an object, in this case, the net force is the difference between the gravitational force (0.98 N) and the normal force (0.98 N) because they act in opposite directions. Thus, the net force is 0 N, indicating that the bird is in equilibrium, and there is no unbalanced force acting on it.