Answer:
Explanation:
Yes she is doing work. With or without the groceries, she is still doing work. She does more work with the groceries than without because Work is defined by F which is defined by mass. The mass increases with the groceries.
The work done is against the force of gravity.
Because they know physics :)
higher amplitude => higher potential energy => more to transform into kinetic energy => higher speed => higher range (distance)
Answer:
15.7 m
Explanation:
m = mass of the sled = 125 kg
v₀ = initial speed of the sled = 8.1 m/s
v = final speed of sled = 0 m/s
F = force applied by the brakes in opposite direction of motion = 261
d = stopping distance for the sled
Using work-change in kinetic energy theorem
- F d = (0.5) m (v² - v₀²)
- (261) d = (0.5) (125) (0² - 8.1²)
d = 15.7 m
Explanation:
Waves are disturbances that transmits energy from one point to another either using the particles of the medium or not.
There are different forms of waves.
The electromagnetic waves is produced by the sun and it transmits energy to all the universe
Ocean waves are clearly physical and we can see how they propagate in nature.
Causes of waves:
- The ultimate cause of a wave is a source of disturbance and energy.
- In the ocean, wave are caused by winds when they cause friction over surface waters.
- Electromagnetic waves are energetic waves that transmits their own energy outward.
- Temperature differences between places can cause waves too.
- Vibration can lead to generation of waves.
- Pressure differences
learn more;
Light waves brainly.com/question/8032392
#learnwithBrainly
Answer:
<h2>30 kg.m/s</h2>
Explanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 15 × 2
We have the final answer as
<h3>30 kg.m/s</h3>
Hope this helps you