forces

A 3.0 kg mass undergoes an acceleration given by a = (2.0i + 5.0j) m/s^2. What is the magnitude of the resultant force acting on the mass?

• 6.0 N

• 15.0 N

• 16 N

• 21 N

A man weighs 875 N on Earth. If the free-fall acceleration on Jupiter is 25.9 m/s^2, what would he weigh on Jupiter? (Assume Earth's free-fall acceleration is 9.80 m/s^2).

• 89.3 N

• 875 N

• 2310 N

• 2590 N

A 210 kg motorcycle accelerates from 0 to 55 mi/hr in 6.0 seconds. What is the magnitude of its constant acceleration?

• 4.1 m/s^2

• 24.6 m/s^2

• 8.6 N

• 210 kg*m/s^2

A 5.0 kg mass is suspended by three ropes. What is the magnitude of the tension in the vertical rope (T3)?

• 5.0 N

• 9.8 N

• 49 N

• 31.5 N

What is the tension in the string directly supporting the 10 kg mass?

• 31.5 N

• 49 N

• 98 N

• 113 N