Question

2. ATO kg bouting ball would require what force to accelerate down an alleyway at a rate of ons?

Answer 1

Answer:

• 2. 30N

• 3. 5,000N

• 4. 15 kg

• 5. 2,800 kg

Explanation:

2. A 10 kg bowling  ball would require what force to accelerate down an alleyway at a rate of 3m/s² ?

Notice that I completed the question with the garbled and missing values:

Data:

• F = ?

• m = 10 kg

• a = 3m/s²

Physical principles:

• Newton's second law: $F=m\times a$

Solution:

• Substitute and compute

        $F=10kg\times 3m/s^2=30N$

3. Salty has a car that accelerates at 5 m/s². If the car has a mass of 1000 kg, how much force does the car produce?

Notice that I arranged the typos.

Data:

• F = ?

• m = ?

• a = ?

Physical principles:

• Newton's second law: $F=m\times a$

Solution:

• Substitute and compute

       $F=1,000kg\times5m/s^2=5,000N$

4. What is the mass of a falling rock if it produces a force of 147 N?

Data:

• F = 147N

• m = ?

• a = falling rock

Physical principles:

• neglecting air resistance ⇒ a = g: gravitational acceleration: 9.8m/s²

• Newton's second law: $F=m\times a$

Solution:

• Clear m from Newton's second law

         $m=\dfrac{F}{a}$

• Substitute with F = 147 N and a = g = 9.8m/s², and compute

      $m=\dfrac{147N}{9.8m/s^2}=15Kg$

5. What is the mass of a truck if it produces a force of 14,000 N while accelerating at a rate of 5 m/s²?

Data:

• F= 14,000N

• m = ?

• a =​ 5m/s²

Physical principles:

• Second Newton's law: $F=m\times a$

Solution:

• Clear m from Newton's second law

         $m=\dfrac{F}{a}$

• Substitute with F = 14,000 N and a = 5m/s², and compute

      $m=\dfrac{14,000N}{5m/s^2}=2,800kg$