The net forward force on the propeller of a 3.2 kg model airplane is 7.0 N. What is the acceleration of airplane?

Given: Force (F) = 7.0 N,

Mass (m) = 3.2 kg

unknown = acceleration (a)

Solve: a = F/m

= 7.0 N/ 3.2 kg

= 2.19 N/kg

What net forces is needed to accelerate a 1900 kg automobile forward at 3.0 m/s2 ?• Given: mass = 1900 kg,

• a = 3.0 m/s2

• Unknown = F

• Solve: F = m x a

• F = 1900 kg x 3.0 m/s2

• = 5700 kg . m/s2

• OR F = 5700 N (Newton)

A base ball accelerates downward at 11.3 m/s2. If the gravitational

force is the

3 mGiven: F = 2.9 N, a = 11.3 m/s2

Unknown: mass

Solve: mass = force/acceleration

m = F/a

= 2.9 N/11./S2

= 0.25 kg

A sailboat and its crew have a combined mass of 655 kg. If a net force of 895 N is pushing the sailboat forward, what is the sailboat’s acceleration?• Given: F = 895 N mass = 655 kg

• Unknown = acceleration• Solve: a = F/m

a = 895N / 655 kg

acceleration = 1.37 m/s2