option:
A force is changing the motion of the bus.
A force is changing the motion of the bus.
There is no force acting on the bus so it stops moving.
There is no force acting on the bus so it stops moving.
The bus is gaining energy because of friction.
The bus is gaining energy because of friction.
The school bus does not lose or gain kinetic energy.
7 answers
The statement that best describes the situation is:
A force is changing the motion of the bus.
When the bus driver applies the brakes, a force (the braking force) is acting on the bus, causing it to decelerate and eventually stop. The other options are incorrect because they deny the presence of a force or misunderstand the energy changes involved.
The correct answer is:
gravity and friction
As the baseball is thrown, gravity pulls it downward, causing its path to curve toward the ground. Friction, although not the dominant force in this situation, can be relevant due to air resistance acting against the motion of the baseball as it travels through the air. The other options do not apply to the forces acting on the baseball in this context.
The correct answer is:
The boat's speed will stay the same.
If no other forces act on the boat (such as additional rowing or resistance from the water), and the current of the river maintains a speed of five meters per second, the boat will continue to move at that speed. According to Newton's first law of motion, an object in motion will remain in motion at a constant speed in a straight line unless acted upon by an external force. In this case, since no other forces are acting on the boat, its speed will remain constant.
The correct answer is:
the resistance of an object to change its motion.
Inertia is a property of matter that describes an object's tendency to resist changes in its state of motion, whether that is remaining at rest or continuing to move at a constant velocity.
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