In Figure 6-2 the scale at left is attached to the ceiling and a mass of 1.00 kg hangs from it. It reads 9.81 N. The identical scale at the right is connected by perfect strings passing over perfect pulleys to two 1.00 kg masses hanging vertically at the end of the strings. The scale at right reads

A. exactly 9.81 N.
B. less than 9.81 N
D. more than 9.81 N,
E. more than 19.62 N


Answer: A. exactly 9.81 N.

Physics & Space Science

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What mass must be on the other end if the plank remains balanced? A) 6.67 kg B) 7.50 kg C) 10.0 kg D) -10.0 kg E) 5.00 kg

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The mass enclosed in any orbit can be estimated from the equation M(

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When two point charges are 2.0 cm apart, each one experiences a 1.0-N electric force due to the other charge. If they are moved to a new separation of 8.0 cm, the electric force on each of them is closest to

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Physics & Space Science

The force on a 0.500-kg particle depends on position such that F(x) = (1.00 N/m2)x2 + ( 4.00 N/m)x for a particle constrained to move along the x-axis

If the particle starts from rest at x = 0.00, what will be its speed when it reaches the position x = 4.00 m? A) 1.65 m/s B) 22.6 m/s C) 14.6 m/s D) 11.3 m/s E) The particle will not reach the position x = 4.00 m.

Physics & Space Science