# Solved Questions

Question
Category: Physics
One or more external forces are exerted on each object enclosed in a dashed box shown in Figure 4.2. Identify the reaction to each of these forces.
Coursepivot December 4, 2022 00:58
Explanation https://www.youtube.com/watch?v=fFlgoHcGd0c Answer (a) Force exerted by spring on hand, to the left; force exerted by spring on wall, to the right. (b) Force exerted by wagon on handle, downward (View full solution)
Category: Physics
What would be the acceleration of gravity at the surface of a world with twice Earth's mass and twice its radius?
Coursepivot December 4, 2022 00:58
Explanation In general, the formula for the gravitational acceleration at the surface is given by: gEarthâ€‹=r2GMâ€‹ where: gEarth = gravitational acceleration on Earth G = universal gravitational constant, which is (View full solution)
Category: Physics
In a tug-of-war between two athletes, each pulls on the rope with a force of 200 N. What is the tension in the rope? If the rope doesn't move, what horizontal force does each athlete exert against the ground?
Coursepivot December 4, 2022 00:57
Explanation According to Newtons third law every force have equal and opposite force. So here the pulling force of two team exert the force of 200 N to which opposing (View full solution)
Category: Physics
If an object is in equilibrium, which of the following statements is not true? (a) The speed of the object remains constant. (b) The acceleration of the object is zero. (c) The net force acting on the object is zero. (d) The object must be at rest. (e) The velocity is constant.
Coursepivot December 4, 2022 00:52
Explanation An object is said to be in equilibrium if net force in every direction acting on the object is zero . According to newton second law. Net force = (View full solution)
Category: Physics
If gold were sold by weight, would you rather buy it in Denver or in Death Valley?
Coursepivot December 4, 2022 00:50
Explanation When we compare the height difference between the Denver and Death valley we can see that Death valley situated at 86 m below the sea level and Denver is (View full solution)