Tema
Q:
For 1:
b) Account for TEN SI derived units (of your choice) and present it as a table with three headings, un
name, symbol, and quantity.
c) Give the Sl prefix for each of the following multiples: both with name and symbol.
i. \( 10^{-12} \)
ii. \( 10^{-9} \)
iii. \( 10^{-6} \)
iv. \( 10^{-3} \)
v. \( 10^{3} \)
vi. \( 10^{5} \)
vii. \( 10^{9} \)
viii. \( 10^{12} \)
Q:
A body of weight W kg.wt was placed on a rough horizontal plane. The
coefficient of static friction between it and the body was \( \frac{1}{5} \), affected by
angle between them is \( 120^{\circ} \). The body was about to move. Find the
value of W .
Q:
Which is not an example of acceleratio
a. maintaining a constant speed
b. slowing down
c. changing direction
d. speeding up
Q:
1.5 A single action suction pump has a diameter of 100 mm and a delivery stroke
of 80 mm and has to be pumped 20 m high vertically.
Calculate:
1.3.1 The volume of water that is pumped per delivery stroke
1.3.2 The mass of water pumped per delivery stroke
1.3.3 The work done per stroke
Q:
Un mitra spara 100 pallottole al minuto aventi
ciascuna la massa di 60 g . Se la forza media che ì
mitragliere esercita per tenere in mano l'arma è
uquale a 50 N , qual è la velocità delle pallottole?
[500 \( \mathrm{m} / \mathrm{s}] \)
Q:
Si un resorte se le cuelsa ua masa de 400 gramos
se forma 20 centimetros
Cual sera el valor de la constante basica?
Q:
1.4 The pump delivers water at a pressure of \( 16 k P a \) while it does \( 24 k J \) work per
minute.
Calculate:
1.4.1 The volume of water delivered in liters per second
1.4.2 The input power to the pump if it has an efficiency of \( 80 \% \)
Q:
A horizontal force of magnitude 80 kg .wt is applied to a container of
weight 80 kg ,wt containing 24 boxes, each box of weight \( 20 \mathrm{~kg}, \mathrm{wt} \) on a
rough horizontal ground. The coefficient of static friction between it and
the container is \( \frac{1}{6} \), find the number of boxes that must be removed so
that the container is about to move on the ground.
Q:
A horizontal force of magnitude \( 80 \mathrm{~kg} . \mathrm{wt} \) is applied to a container of
weight 80 kg ,wt containing 24 boxes, each box of weight 20 kg ,wt on a
rough horizontal ground. The coefficient of static friction between it and
the container is \( \frac{1}{6} \), find the number of boxes that must be removed so
that the container is about to move on the ground
Q:
Calcular el trabajo para elevar hasta 12 metros en cuerpo de 15 kgf
2) Se eleva un cuerpo hasta 3 m mediante un trabajo de 75 kgm ¿Cuál es el peso del
cuerpo?
3) Para subir un tonel hasta 3 m de altura ha sido neceṣario un trabajo de 240 kgm ¿Cuánto
pesa el tonel?
4) ¿Qué trabajo (en Julio y kilovatios-hora) realizará un hombre para elevar una bolsa de
70 kgf a una altura de \( 2,5 \mathrm{~m} \) ?
5) ¿Qué energía cinética alcanzará un cuerpo que pesa 38 kgf a los 30 segundos de caída
libre?
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