1st Nine-Weeks
Week # 07
Physics
CW 05: Newton’s Second Law
Name: _______________________________________ Date: _____________ Period: __________
You must show the work that leads to your answer to receive credit. The answer must include the
appropriate unit.
_____________________ 1. What force must this rocket have to accelerate at 12 m/s 2?
The mass of the rocket is 50 kg.
_____________________ 2. What force must this rocket have to accelerate at 12 m/s 2?
The mass of the rocket is 50 kg.
_____________________3. The springs force is 250 N. The balls mass is 0.025 kg. If the spring is
pulled back 0.010 m, what is the balls velocity?
0.010
m
_____________________ 4. What force must a 2500 kg car’s brakes have to stop the car in a
distance of 60 m if the car is traveling at 40 m/s?
_____________________ 5. What is the apparent weight of a man who has a weight of 600 N when
the elevator accelerates downward at 3 m/s2?
_____________________ 6. A fishing line is guaranteed to withstand 60 N of force without breaking.
What is the greatest acceleration that can be applied to a 2 kg fish?
_____________________ 7. What is the force in the trailer hitch? The truck is accelerating at
4 m/s2. The mass of the truck is 1000 kg and the mass of the trailer is
375 kg.
1000 kg
375 kg
8. A grocery store bag boy pulls the carts at an acceleration of 1.5 m/s2. What is the tension in
each coupling? Each cart has a mass of 5 kg.
_____________________ coupling A
_____________________ coupling B
_____________________ coupling C
_____________________ coupling D
Answers: (1) 600 N (2) 1090 N (3) 14.1 m/s (4) 33250 N (5) 416 N (6) 20.2 m/s2
(7) 1500 N (8) (a) 7.5 N (b) 15 N (c) 22.5 N (d) 30 N