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Which machine changes the direction of force needed to do a task without changing the size of force needed?
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∙ 9y ago
A pulley can do that.
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Which machine changes the direction of force needed to do a task without changing the size or force needed?
A pulley can do that.
How can velocity change without changing the speed?
Consider velocity as consisting of a speed, and a direction. If any of the two changes - that is, if either the speed or the direction changes - then the velocity changes.
Describe a situation in which an object accelerates without changing speed?
Acceleration is the rate of change of velocity over time, so velocity must always be changing if the object is accelerating. HOWEVER, you said speed which means only magnitude, not direction. If you stay the same speed, but change direction then you are accelerating. Simple answer: when you are going the same speed in a circle - velocity changes, therefore acceleration changes.
What is how fast a velocity is changing at a specific instant?
IF it changes to the completely opposite direction ... does a 180 or a "U-turn" ...then the velocity must be zero at that instant. But if the direction only changesby turning a corner or going around a bend, then there's no way to know whatthe velocity is without a lot more information.
How can you change only one component of the velocity without changing the speed?
Reverse the direction of the component.
Which machine changes the direction of force needed to do a task without changing the size of the force needed?
A pulley can do that.
Which machine changes the direction of force needed to do a task without changing the size or force needed?
A pulley can do that.
How can velocity change without changing the speed?
Consider velocity as consisting of a speed, and a direction. If any of the two changes - that is, if either the speed or the direction changes - then the velocity changes.
Which simple machines rely on changes in direction to make work easier?
An axel is a simple machine that relies on change in direction to make work easier. Furthermore, a simple machine is a device that makes work easier by increasing force or changing the direction of a force without electricity or other power sources.
Is changing direction really the same as changing speed?
No. It is possible to change direction without changing speed. However, it is not possible to change direction without changing velocity.
How are physical changes alike?
all physical changes are alike in which all of them changing without changing in chemical makeup of the matter we have
How are all physical changes alike?
all physical changes are alike in which all of them changing without changing in chemical makeup of the matter we have
Can reflection of light happen without changing the direction of light?
No, reflection means that the direction of light is changed.
How does matter change without changing it's identity?
Matter can undergo physical changes without changing its identity. Physical changes include melting or freezing; evaporating or condensing; changing shape; chopping or grinding into smaller pieces.
Describe a situation in which an object accelerates without changing speed?
Acceleration is the rate of change of velocity over time, so velocity must always be changing if the object is accelerating. HOWEVER, you said speed which means only magnitude, not direction. If you stay the same speed, but change direction then you are accelerating. Simple answer: when you are going the same speed in a circle - velocity changes, therefore acceleration changes.
Can refraction of light happen without changing the direction of light?
no. Energy is conserved.
What are changes that alter the form of matter without changing its basic chemical composition are called?
These are physical changes.
