Answer:
Explanation:
According to work energy theorem
change in kinetic energy of truck = work done against it
work done against it = force x displacement
= - 850 x 8 = 6800 J
change in kinetic energy of truck = - 6800 J .
energy will be reduced by 6800 J
I believe it is away from his arm since the question states his arm is applying an upwards force
It is actually inference because inference is using observation and background to reach a logical conclusion
Explanation:
Pure substances are typically elements and compound with the following characteristics:
- Pure substances are distinct substances.
- They are homogeneous in all their parts i.e they are the same all through.
- They have a definite composition
- They cannot easily be separated or broken down into simpler substances by physical means.
- Separation by physical means is not easy
- They have a unique sets of physical properties
Impure substances are mixtures. They have the following features:
- Their composition is indefinite i.e they consist of two or more elements and or compounds in any proportion by mass.
- Constituents retain their identities i.e physical properties are retained.
- The constituents reacts differently to changed conditions.
- They can easily be separated into their constituents by physical methods.
learn more:
Mixtures brainly.com/question/1446244
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