a) According to Newton's First Law of Motion, an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction, unless acted upon by an external force. So, when the pickup truck is moving, the passengers in the bed of the truck will also be moving at the same speed. If the truck suddenly stops or changes direction, the passengers in the bed will continue moving in their original direction due to inertia, potentially resulting in injuries.
b) Newton's First Law of Motion states that an object at rest will remain at rest unless acted upon by an external force. When a car is on very slippery ice, there is reduced friction between the tires and the surface, making it difficult for the car to start moving. The car will resist changing its state of rest due to inertia, making it hard to overcome this force and accelerate on icy surfaces.
c) In the context of lift-off, Newton's First Law of Motion states that an object in motion will continue in motion in a straight line unless acted upon by an external force. When a spacecraft lifts off, it experiences a powerful upward force. Placing astronauts horizontally in the capsule helps distribute the force more evenly over their bodies. This position allows them to better manage the acceleration and G-forces experienced during lift-off, allowing them to withstand the external forces acting on their bodies more effectively.
Explain each statem ent using inertia o r Newtons First Law of Motio n. a) You should not sit in the bed (back) of a pickup trick when it is moving . b) It is hard to get a car moving on very slippery ice. c) During lift off, astronauts are placed horizontally in the capsule rather than vertically.
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