Tema
Q:
3.1 Define equilibrium of forces,
3.2 For the system of forces below, find magnitude and direction of the resultant.
Q:
The mechanical advantage of a wedge is 7 . If I apply a force of 200 N to the object,
output force?
Q:
8. It takes 130 N to push a 52 kg object up an inclined plane.
a. Calculate the gravitational force on the object
b. This is the input / output force.
Q:
An avalanche demonstrates what kind of energy conversion?
A. Kinetic energy to heat energy
B. Chemical potential energy to heat energy
C. Kinetic energy to gravitational potential energy
D. Gravitational potential energy to kinetic energy
Q:
Two physics students are moving books from the floor to a table. Each student lifts 14 books that
each have a mass of 1.1 kg up to a table with a height of 0.75 m . Student A lifs the books in 18.2
seconds. Student B lifts the books in 24.5 seconds.
a. Which student does the most work? Explain how you know.
Q:
A BMW motor car with mass of 1,2 ton accelerates from rest uniformly from
rest up a gradient 1 of 3 and reaches a speed of \( 72 \mathrm{~km} / \mathrm{h} \) after 3 minutes.
Calculate:
1.2.1 The acceleration of the BMW.
1.2.2 The kinetic energy that the BMW possess after 3 minutes.
1.2.3 Potential energy after 3 minutes.
Q:
Noz mase 1200 t smanji brzinu sa \( 10 \frac{\mathrm{~m}}{\mathrm{~s}} \) na \( 4 \frac{\mathrm{~m}}{\mathrm{~s}} \) u toku 3 minute. Odredi silu kocenja
Q:
Задание 3
Чему равно ускорение свободного падения на высоте над
поверхностью Земли, равной двум ее радиусам?
Q:
Per preparare un bagno, una vasca viene riempita con 40 L
d'acqua alla temperatura di \( 60^{\circ} \mathrm{C} \) e 20 L alla temperatura
di \( 18^{\circ} \mathrm{C} \).
Qual è la temperatura ottenuta? Trascura le dispersioni
di calore.
Q:
If a 20 N force is being applied to an
object at an angle of \( \frac{\pi}{2} \) rad, what is
the vertical force being applied to the
object?
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