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oksian1 [2.3K]
3 years ago
11

How much force is needed to accelerate a 1,500 kg car at a rate of 7 m/s2?

Physics
1 answer:
Sidana [21]3 years ago
4 0

Newton's 2nd law of motion:   

                       Force = (mass) x (acceleration)
                                         |                 |   
                                 (1,500 kg) x (7 m/s²)  =  10,500 newtons .
                         
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Two moles of helium are initially at a temperature of 21.0 ∘Cand occupy a volume of 3.30×10−2 m3 . The helium first expands at c
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Answer:

(B) The total internal energy of the helium is 4888.6 Joules

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(B) ∆U = P(V2 - V1)

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T1 = 21°C = 294K, V1 = 0.033m^3, n = 2moles, V2 = 2× 0.033=0.066m^3

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Assuming a closed system

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Answer:

The answer is given below

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m_1=0.6kg,u_1=-5m/s(moving \ west),m_2=0.8kg,u_2=2m/s,k=1200N/m

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The final velocity of cart 1 after collision is given as:

v_1=(\frac{m_1-m_2}{m_1+m_2})u_1+\frac{2m_2}{m_1+m_2}u_2\\  Substituting:\\v_1=\frac{0.6-0.8}{0.6+0.8} (-5)+\frac{2*0.8}{0.6+0.8}(2)= 5/7+16/7=3\ m/s

The final velocity of cart 2 after collision is given as:

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