Newton's second law indicates that when a net force acts on an object, it must accelerate. Does this mean that when two or more forces are applied simultaneously on the object, the object must accelerate? O Yes it must accelerate since there are two or more forces acting on it. ONot necessarily since it depends on the magnitudes and directions of the forces.
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- Newton's third law says that "For every action, there is an equal and opposite reaction." This means that in each interaction between two objects, they each experience and exert the extact same amont of force on each other. However, this does not mean that the forces acting on either individual object are balanced. When we talk about balanced forces, both forces are acting on the same object. The forces in a Newton's Third Law pair are acting on separate objects, not the same object. a. Imagine pushing a shopping cart at a constant speed. Draw the free-body diagrams for both the cart and yourself. Remember that if the cart is moving at a constant speed, the net force on it must be zero. There is another force other than the push acting on the cart. CartUnder Oregon Law, all passengers in a moving vehicle must wear a seatbelt. Using Newton's First Law, explain why a seatbelt is necessary to protect passengers in the event of a car crash.THREE FORCES, EACH OF 10 N, ACT ON THE SAME OBJECT. WHAT IS THE MAXIMUM TOTAL FORCE THEY CAN EXERT ON THE OBJECT? THE MINIMUM TOTAL FORCE?
- Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second a force of 93.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. (c) Calculate the acceleration. m/s2 (d) What would the acceleration be if friction is 18.0 N?A greater force is required to move an object with a greater mass than one with a smaller mass. Select one: O True O FalseA ball is tossed vertically upward. When it reaches its highest point (before falling back downward) O the velocity is zero, the acceleration is zero, and the force of gravity acting on the ball is directed downward. O the velocity, acceleration, and the force of gravity on the ball all reverse direction. O the velocity and acceleration reverse direction, but the force of gravity on the ball remains downward. 4 O the velocity is zero, the acceleration is directed downward, and the force of gravity acting on the ball is directed downward. the velocity is zero, the acceleration is zero, and the force of gravity acting on the ball is zero. COLOCO - O
- At a given instant in time, a 1.9-kg rock is observed to be falling under an acceleration of 1.7m/s2 downward. What is the magnitude of the net force in Newtons acting on the rock at that moment? (Think about how accelerations and forces are related)A boat moves through the water with two forces acting on it. One is a 1,650-N forward push by the water on the propeller, and the other is a 1,200-N resistive force due to the water around the bow. (a) What is the acceleration of the 1,200-kg boat?m/s 2(b) If it starts from rest, how far will the boat move in 22.5 s?m(c) What will its velocity be at the end of that time?m/s