WorksheetsMechanical energy
Total questions: 20
Worksheet time: 34mins
Regarding to sound, what is a vacuum?
A machine use to clean the house
A medium in which sound cannot propagate
A medium in which sound is able to propagate
Non of the above
Is the ability of something to cause change in itself or other things
Energy
Sound
Friction
Motion
Is the energy associated with the chemical bonds that link atoms in a pure susbtance.
Thermal energy
Chemical energy
Electrical energy
Potencial energy
We have two object, A and B, in isolation. If object B gains 500 J, what must have happened to body A?
The energy gained by object B its depends on the temperature
The energy gained by object B must be more as the energy lost by object A
The energy gained by object B must be the same as the energy lost by object A
None of the above.
What mechanical energy does a 900 kg airplane have if it flies at 360 km/h and 1 km high?
13.32⋅106 Joules
11.30⋅102Joules
11.5⋅103 Joules
9⋅105
Is the energy associated with changes in atomic nuclei
Thermal energy
Atomic energy
Nuclear energy
None of the above
Starts are giant burning balls of incandecent gas, or plasma, heated by thr large amount of energy from...
Nuclear fusion
Nuclear fission
Thermal energy
Atomic energy
They transform the mechanical energy of matter into thermal energy
Dissipative forces
Conservation of mechanical energy
Heat
None of the above
The potential energy of an object increases 50 J. If there is no friction, how much kinetic energy has tranformed?
100 JOULES
50 JOLUES
50 JOULES
200 JOULES
A 50 kg object sits on the roof of a 25 m building. If we neglect friction, at what velocity will it hit the ground if it falls freely?
22.14 m/s
45 km/h
29.56 m/s
None of the above
Their vibration are perpendicular to their propagation
Transverse waves
Longitudal waves
Sound
Light
They must propagate using matter as a medium
Mechanical waves
Electromagnetic waves
Heat waves
None of the above
Is electricity and magnetism that oscillate, not matter. They may propagate in any medium and even in vacuums
Mechanical waves
Electromagnetic waves
Heat waves
None of the above
Is the propagation of vibrating objects through a medium
Mechanical waves
Electromagnetic waves
Heat waves
Sound
We may recognise people speaking to us even when we do not see them due to the...
Intensity of their voice
Pitch of their voice
Timbre of their voice
None of the above.
A research proved that a loud conversation may generate a 60 dB of sound. Would that conversation may cause damage on your ear ?
True
False
If we neglect friction with air, how far will a 2 kg object travel if we launch it from the ground at 36 km/h?
5.1 m
6.2 m
3 m
None of the above.
If we drop a 200 g ball from 1 m and when it returns to a height of 80 cm after bouncing on the ground, how much energy did the bounce dissipate?
0.40
0.196
0.40 JOULES
0.196 JOULES
How much kinetic energy does a 2.5 tones car have when it drives at 120 km/h?
700 JOULES
1.39⋅106Joules
1.39⋅106
None of the above
A 69 kg ski jumper jumps and reaches a heigth of 10.7 m. What potential energy does she have?
None of the above
7000 Joules
7235 Juloes
7235 Joules
