1. The normal force is always less than or equal to force of gravity
a) True
b) False
2. What is the value of the normal force? (there is an image of a box with a mass of 10kg and it is sitting on a flat horizontal surface)
a) 98 N [up]
b) 98 N [down]
c) 10 N [up]
d) 10 N [down]
3. pool table has a mass of 600 kg. In an attempt to move it, Peter exerts an upward force of 1000 N on the poor table. What is the normal force now acting on the pool table?
a) 5880 N
b) 6880 N
c) 4880 N
d) 400 N
1. True
2. 98 N, down.
3. Fn = m*g - 1000 = 600kg * 9.8-1000 =
5880 - 1000 = 4880 N.
1. The correct answer is b) False. The normal force is the force exerted by a surface to support an object resting on it. It is always equal in magnitude and opposite in direction to the force of gravity acting on the object. So, the normal force is actually equal to the force of gravity, not less than or equal to it.
2. To determine the value of the normal force, you need to know the force of gravity acting on the box. The force of gravity can be calculated using the equation: force of gravity = mass * acceleration due to gravity. In this case, the mass is 10 kg and the acceleration due to gravity is approximately 9.8 m/s^2. Therefore, the force of gravity = 10 kg * 9.8 m/s^2 = 98 N. Since the normal force is equal in magnitude and opposite in direction to the force of gravity, the answer is a) 98 N [up].
3. The normal force is the force exerted by a surface to support an object resting on it. In this case, the pool table has a mass of 600 kg, and Peter exerts an upward force of 1000 N. Since the pool table is not moving vertically, the normal force must be equal in magnitude and opposite in direction to the force Peter exerts. Therefore, the normal force is also 1000 N, so none of the provided answer choices are correct.