Forces Practice Worksheet copy PDF

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Free-body Diagrams Draw free-body diagrams for questions 1 to 5 in the spaces provided. Use the key below to show that forces applied to the object.

Key of Forces Frictional Force = Ff Tensional Force = FT Normal Force = FN Air Resistance Force = Fair Applied Force = FA Gravitational Force = Fg Electrical Force Magnetic Force 1. A book is at rest on a tabletop. Diagram the forces acting on the book.

2. A girl on a bar is suspended motionless from the ceiling by two ropes. Diagram the forces acting on the combination of girl and bar.

3. An egg is free-falling from a nest in a tree. Neglect air resistance. Diagram the forces acting on the egg as it is falling.

4. A rightward force is applied to a book in order to move it across a desk with a rightward acceleration. Consider frictional forces. Neglect air resistance.

5. A physics student rests a backpack upon his shoulder. The pack is suspended motionless by one strap from one shoulder. Diagram of the forces of the backpack on the shoulder.

F=ma Use the formula to solve the following force problems. Remember sometimes a=9.8m.s-2 . 1. A force of 15 Newtons is applied to an object with a mass of 5 kilograms. What will be the object's final velocity after 10 seconds?

2. What net force is necessary to accelerate a 300 kg object at 3m.s -2?

3. A block of ice with a mass of 10 kg is resting on a frozen pond. How much force will it take to accelerate the ice at 0.25 m.s-2.

4, What is the mass of a 198N weakling?

5. How much does a 4 kg cat weigh on earth?

6. A 100 N force is applied to a 500 kg crate resting on frictionless wheels. What will be its acceleration?

Net Forces 1. Bob is pushing a heavy couch to another part of the living room. Bob is pushing with a force of 10 N while the couch is pushing against Bob with a force of 8 N. a) What is the total net force due to Bob’s pushing?

b) Are forces balanced or unbalanced? __________________________________________________________________________ c) What will happen to the motion of the heavy couch? __________________________________________________________________________ 2. Interpret each drawing of forces on the box. Calculate and write the resulting net force on the blank below the box (make sure to include the correct unit of measure). On the next blank, write the word balanced or unbalanced and circle the arrow for the direction of the resulting net force.

3. A large television requires a force of 390 N to be lifted. An average person can lift with a force of 50 N - how many average people would it take to move this large television? Hint: on this problem, you will have to use another maths operation OTHER than addition or subtraction.

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