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Newton's Laws Quiz. Una risorsa per il CLIL di Fisica in lingua inglese

red - Di seguito viene proposto un test sulle leggi di Newton, utile per le classi in cui sono attivi dei percorsi CLIL di Fisica in lingua inglese.

Newton's Laws Quiz

Answer each of the questions to the best of your ability. To earn full points on each question you need to write out the givens (with proper units), identify the equations you will use, and solve the question providing an answer with proper units.

1. What force is needed to accelerate a child on a sled (total mass of 55 kg) at 1.4 m/s^2 ?

2. What is the weight of a 68.0kg astronaut on

a. Earth

b. The moon (g = 1.7 m/s^2 )

c. Mars (g = 3.7 m/s^2 )

3. Superman must stop a train traveling at 33.3 m/s in 150 m to keep it from hitting a stalled car on the tracks. If the train’s mass is 3.6x10 5 kg, how much force must he exert? How much force does the train exert on Superman?

4. A 20.0kg box rests on a table.

a. What is the weight of the box and the normal force acting on it?

b. A 10.0kg box is placed on top of the 20.0kg box. Determine the normal force the table exerts on the 20.0kg box and the normal force the 20.0kg box exerts on the 10.0kg box.

c. Draw the free-body diagram of the entire system.

5. What is the average force needed to accelerate a 9.20 kg cannon ball from rest to 125 m/s over a distance of 0.800m along the distance of the cannon?

6. Two crates of mass 65kg and 125kg are in contact and at rest on a horizontal surface. A 650N force is exerted on the 65kg crate. If the coefficient of kinetic friction is 0.18 calculate the acceleration of the system.

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