Download Physical Science Worksheet: Force Short Answer 1. The SI unit of

Physical Science Worksheet: Force
Short Answer
1. The SI unit of force, named for the scientist who described the relationship between motion
and force, is called the
2. Earth pulls on the moon and holds the moon in its orbit. The moon pulls on Earth with an
equal and opposite force. This is an example of
3. What is the unbalanced force that slows down a ball rolling across the floor?
4. When gravitational forces and air resistance equalize on an object that is falling toward Earth
and the object stops accelerating, what is the velocity of an object called?
5. As the distance between two objects increases, the force of gravity ________.
6. As a football play begins, a lineman from one team pushes the opposing lineman backward.
This is an example what kind of force?
7. What is the name of the friction that exists between two stationary objects?
8. What property of a stalled car determines how much effort is required to move it?
9. Which of the four main types of forces is the strongest?
10. Which of the four main types of forces acts over the shortest distance?
11. Which of the four main types of forces acts over the longest distance?
12. Which of the four main types of forces is the weakest?
13. Lets say you have a bowling ball. You placed the ball on the scales down in the lab and
found that its mass is 10 kg. Now let’s say that an astronaut is going to carry your bowling
ball into space with him. He lands on the moon and decides that he wants to find out what the
mass of the bowling ball is on the moon. What would he find out is the mass of the bowling
ball?
14. You are driving around in your car one day. Your 1674 kg car is a very comfortable car to ride
in. You are driving at 37 m/s when you suddenly decide to accelerate to 73 m/s. It takes you
14 s to accelerate. What is the average net force that you have applied to the car?
15. The upward force on an object falling through the air is ____.
16. A feather will fall through the air more slowly than a brick because of ____.
17. In the absence of air, a penny and a feather that are dropped from the same height at the
same time will ____.
18. For any object, the greater the force that's applied to it, the greater its ____ will be.
19. A 300-N force acts on a 25-kg object. The acceleration of the object is ____.
20. A 3,000-N force acts on a 200-kg object. The acceleration of the object is ____.
21. An object that is in free fall seems to be ____.
22. If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.
23. A 1500-kg car can accelerate from rest to 72 km/h in 8.0 s. What is the net force acting on the
car to cause this acceleration?
24. In the universal gravitation equation, the constant G has a value of 6.67x10–11 N·m2/kg2. Find
the force a 4 kg ball exerts on a 2 kg ball if the distance between their centers is 1 m.
25. A car of mass 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car
to rest over a distance of 79.0 m. Calculate the force acting on the car.
Physical Science Worksheet: Force
Answer Section
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newton.
Newton’s third law.
the force of friction
terminal velocity
decreases
unbalanced
Static
mass
Strong Nuclear
Strong Nuclear
Gravitational
Gravitational
10kg
4304.57N
air resistance
air resistance
fall at the same rate
acceleration
12 m/s2
15 m/s2
weightless
travel horizontally
3.8 kN
5.34 x10-10 N
1.32x104 N