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Mechanics | Relativity
A 20.0-kg horizontal plank 4.00 m long rests on two supports, one at the left end and a second 1 .00 m right end. What is the magnitude of the force exerted on the plank by the support near the right end?
Mechanics | Relativity
no forces are acting on an object. Which of the following statements is correct? (a) The object is in equilibrium if the forces are equal in magnitude and opposite in direction. (b) The object is in equilibrium if the net torque on the object is zero.(d) The object is in equilibrium if the net force and the net torque on the object are both zero.
Mechanics | Relativity
A book of mass 250g is dropped vertically from a building 180m tall, where the wind provides and constant horizontal force of 5N on the book. What is the magnitude of the velocity of the book when it hits the ground?
Mechanics | Relativity
A uniform beam of length 7.60 m and weight 4.50 x 102 N is carried by two workers, Sam and Joe. Determine the force that each person exerts on the beam given that Sam is at a distance of 1.00 m away from one of the edge and Joe is 2.00 m towards the other edge of the beam. (Sam is walking towards Joe)
Mechanics | Relativity
What are the necessary conditions for a system to be in a state of static equilibrium?
Mechanics | Relativity
Can an object be in equilibrium if it is in motion? Explain.
Mechanics | Relativity
Give an example in which the net force acting on an object is zero and yet the net torque is nonzero.
Mechanics | Relativity
A 20.0-kg horizontal plank 4.00 m long rests on two supports, one at the left end and a second 1 .00 m from the right end. What is the magnitude of the force exerted on the plank by the support near the right end?
(d) 131 N.
(c) 112 N
(b) 45.2 N
(a) 32.0
(d) 131 N.
(c) 112 N
(b) 45.2 N
(a) 32.0
Mechanics | Relativity
Two forces are acting on an object. Which of the following statements is correct? (a) The object is in equilibrium if the forces are equal in magnitude and opposite in direction. (b) The object is in equilibrium if the net torque on the object is zero. (c) The object is in equilibrium if the forces act at the same point on the object.
(d) The object is in equilibrium if the net force and the net torque on the object are both zero.
(d) The object is in equilibrium if the net force and the net torque on the object are both zero.
Mechanics | Relativity
A rod 7.0 m long is pivoted at a point 2.0 m from the left end. A downward force of 50 N acts at the left end, and a downward force of 200 N acts at the right end. At what distance to the right of the pivot can the third force of 300 N acting upward be placed to produce rotational equilibrium? Note: Neglect the weight of the rod.
(e) 3.5 m
(d) 4.0 m
(c) 3.0 m
(b) 2.0 m
(a) 1.0 m
(e) 3.5 m
(d) 4.0 m
(c) 3.0 m
(b) 2.0 m
(a) 1.0 m
