Força de Atrito
Quiz
•
Physics
•
10th - 12th Grade
•
Practice Problem
•
Hard
Isaías Batista
Used 14+ times
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8 questions
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1.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Um bloco de massa m = 10 kg movimenta-se numa mesa horizontal. O coeficiente de atrito dinâmico entre o bloco e a mesa é μd = 0,20. Sendo g = 10 m/s², determine o módulo da força de atrito do bloco, em N.
(Digite apenas o valor)
2.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Um bloco de massa m = 10 kg movimenta-se numa mesa horizontal sob ação de uma força horizontal F de intensidade 30 N e um atrito de 20 N. Sendo g = 10 m/s², determine o módulo da aceleração do bloco, em m/s².
(Digite apenas o valor)
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Um corpo de massa m = 2,0 kg movimenta-se numa mesa horizontal, sob a ação de uma força de atrito de 4,0 N. Qual o valor do coeficiente de atrito dinâmico entre o corpo e a mesa?
0,40
0,30
0,20
0,10
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Um corpo de massa m = 2,0 kg movimenta-se numa mesa horizontal, sob a ação de uma força de atrito de 4,0 N. Qual o valor aproximado da intensidade da força resultante que a mesa exerce no corpo?
20,4 N
14,9 N
9,5 N
4,0 N
5.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Qual a intensidade da força de atrito, em N, no bloco de 2 kg?
(Digite apenas o valor)
6.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Se mA = mB = 10 kg, F = 60 N, μ = 0,20 e g = 10 m/s², qual a intensidade, em N, da força que A exerce em B?
(Digite apenas o valor)
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Qual o valor da força mínima, em N, para manter o apagador de 0,05 kg suspenso? (μe = 0,4 e μd = 0,3)
2,00 N
1,75 N
1,50 N
1,25 N
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