NEW
Font size
Worksheets11 grade review 2 term MCQ
Total questions: 20
Worksheet time: 10mins
A spring is compressed by a force. The graph shows the compressive force F as a function of the length L of the spring. Determine the stiffness of the spring.
0.2 N m⁻¹
5 N m⁻¹
100 N m⁻¹
200 N m⁻¹
A plastic material is stretched by a force up to the point beyond its elasticity, then the force is reduced to zero. On the "force - extension" graph, areas X, Y, and Z are marked. Which area represents the net work done on the sample?
X
X + Y
Y + Z
Z
In the "stress-strain" experiments for metallic wires, the stress axis is marked in units of 10⁸ Pa, and the strain axis is in percentages, as shown for one wire. What is the value of Young's modulus for the material of the wire?
6.0 × 10⁷ Pa
7.5 × 10⁸ Pa
1.5 × 10⁹ Pa
6.0 × 10⁹ Pa
The Young's modulus of the steel was defined for a wire and is equal to E. Another experiment was conducted with a wire made of the same steel, but with double the length and a diameter reduced by half. What value of Young's modulus is obtained in the second experiment?
(1/4)E
(1/2)E
E
2E
What is plastic deformation?
Plastic deformation occurs when the deformation is not proportional to the stress, but after the load is removed, the material returns to its original length.
Plastic deformation occurs if, after the load is removed, the material contracts, but there has been a permanent elongation.
Plastic deformation continues until the elongation ceases to be proportional to the load.
Plastic deformation occurs when the material elongates in such a way that the deformation is directly proportional to the stress.
Two bodies are gravitationally attracted to each other. If the distance between their centers is halved, the gravitational force…
will also be halved.
will become a quarter of the previous value.
will double.
will increase fourfold.
A test mass moves from the surface of the Earth to point P in deep space, very far from any massive bodies. Which line, A–D, in the table correctly shows how the magnitude of the gravitational field strength and gravitational potential experienced by the test mass change as it moves towards point P?
field strength decreases; potential decreases
field strength decreases; potential increases
field strength increases; potential increases
field strength increases; potential decreases
The gravitational potential at a height h above the Earth's surface is −5.12 × 10⁷ J kg⁻¹, and the acceleration due to gravity at this point is 6.4 m s⁻². The radius of the Earth is 6400 km. What is the value of h?
1200 km
1600 km
1800 km
2400 km
To make a satellite synchronous with the Earth, it should be launched to the required height, moving…
from west to east in the equatorial plane
from south to north in the polar plane
from east to west in the equatorial plane
from north to south in the polar plane
If vₑ is the second cosmic velocity for Earth, and vₚ is for a planet with a radius half that of Earth, then
vₑ = vₚ/4
vₑ = vₚ/2
vₑ = 2vₚ
vₑ = 4vₚ
Select the incorrect statements from the ones below. I. The orbital speed of a satellite increases with the increase of the orbit radius. II. The escape velocity of a particle from the Earth's surface depends on the speed with which it is launched. III. The period of a satellite's orbit does not depend on the radius of the orbit. IV. The orbital speed is inversely proportional to the square root of the orbit radius.
I, II and III
I and IV
I and II
I, II and IV
Geostationary satellite is one that
orbits the Earth at a suitable height with the same angular velocity and in the same direction as the Earth's rotation on its axis
orbits like other satellites, but in the direction opposite to the Earth's rotation
remains stationary at a fixed height above the Earth's surface
none of the above
The diagram shows a situation just before a head-on collision. A truck with a mass of 20000 kg is moving at a speed of 20.0 m/s towards a passenger car with a mass of 900 kg, which is moving at a speed of 30.0 m/s towards the truck. What is the magnitude of the total momentum?
373 kN·s
427 kN·s
3600 kN·s
4410 kN·s
A ball with a mass of 0.5 kg was thrown at a wall with a speed of 12 m/s; it rebounds with a speed of 8 m/s. The collision lasts for 0.10 s. What is the average force acting on the ball due to the collision?
0.2 N
1 N
20 N
100 N
Which statement reflects the principle of conservation of momentum?
The momentum of a body is equal to the product of its mass and its velocity.
Force is equal to the rate of change of momentum of the body it acts upon.
The total momentum of a system of interacting bodies remains constant if no external force acts on it.
In a perfectly elastic collision, the relative momentum of the bodies before the impact is equal to their relative momentum after the impact.
Две равные массы X и Y движутся навстречу друг другу по без трения воздушному треку, как показано. Происходит упругое столкновение. Какая строка задаёт возможные скорости двух масс после столкновения?
скорость X: ноль; скорость Y: 20 см с⁻¹ вправо
скорость X: 10 см с⁻¹ вправо; скорость Y: 10 см с⁻¹ вправо
скорость X: 20 см с⁻¹ влево; скорость Y: ноль
скорость X: 30 см с⁻¹ влево; скорость Y: 50 см с⁻¹ вправо
In perfectly elastic collisions between two atoms, it is always true that
the initial velocity of one atom will be the same as the final velocity of the other atom
the relative speed of approach of the two atoms is equal to their relative speed of separation
the total momentum must be conserved, but a small part of the total kinetic energy may be lost during the collision
regardless of the initial states of motion, neither atom can be at rest after the collision
Четыре мини‑графика силы (ось y) от удлинения (ось x) для растягиваемой резиновой ленты помечены A–D. Какой график наилучшим образом описывает зависимость силы от удлинения, когда ленту растягивают почти до точки разрыва? Выберите букву графика.
A
B
C
D
The gravitational potential at the center of a square with a side length a , if four identical masses m are located at its vertices, is
zero
−42aGm
42aGm
−42aGm2
What quantities are conserved in an inelastic collision? Choose the correct set.
kinetic energy — conserved; total energy — not conserved; momentum — conserved
kinetic energy — conserved; total energy — not conserved; momentum — not conserved
kinetic energy — not conserved; total energy — conserved; momentum — conserved
kinetic energy — not conserved; total energy — conserved; momentum — not conserved
