ACME ACADEMYWEEKLY EVALUATION TESTSubject: Science
Time Limit: 20 Mins
Max Marks: 20 Marks
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Student Name:
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Class / Sec:
Date:
GENERAL INSTRUCTIONS:
1.
Which physical quantity is required to change the state of rest or of uniform motion of an object?
[1 Mark]
2.
What is the natural tendency of objects to resist a change in their state of rest or of uniform motion called?
[1 Mark]
3.
Which of the following factors is a direct measure of the inertia of a body?
[1 Mark]
4.
Newton’s First Law of Motion is also popularly known as the:
[1 Mark]
5.
When a carpet is beaten with a stick, the dust comes out of it. This phenomenon can be explained by:
[1 Mark]
6.
Momentum is defined as the product of an object's:
[1 Mark]
7.
What is the SI unit of momentum?
[1 Mark]
8.
According to Newton's Second Law of Motion, the rate of change of momentum of an object is directly proportional to the:
[1 Mark]
9.
The mathematical formulation of Newton's Second Law yields which fundamental equation?
[1 Mark]
10.
Why does a fast-moving cricket ball cause more injury to a fielder's hand than a tennis ball moving at the same speed?
[1 Mark]
11.
A fielder pulls his hands backward while catching a fast-moving cricket ball. By doing so, what is he fundamentally doing to reduce the impact?
[1 Mark]
12.
Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. These action and reaction forces:
[1 Mark]
13.
When a sailor jumps out of a rowing boat forward, the boat moves backwards. This is a classic example demonstrating:
[1 Mark]
14.
The total momentum of an isolated system of interacting objects remains constant provided no external unbalanced force acts on it. This principle is known as:
[1 Mark]
15.
A bullet of mass 20 g is horizontally fired with a velocity of 150 m/s from a pistol of mass 2 kg. What is the recoil velocity of the pistol?
[1 Mark]
16.
Assertion (A): If an object is moving at a constant velocity, the net unbalanced force acting on it must be zero. Reason (R): An unbalanced force is only required to accelerate an object, not to maintain its uniform motion.
[1 Mark]
17.
A constant force acts on an object of mass 5 kg for a duration of 2 s. It increases the object's velocity from 3 m/s to 7 m/s. Find the magnitude of the applied force.
[1 Mark]
18.
Two objects of masses 100 g and 200 g are moving along the same line and direction with velocities of 2 m/s and 1 m/s respectively. They collide, and after the collision, the first object moves at a velocity of 1.67 m/s. What is the velocity of the second object?
[1 Mark]
19.
When a car takes a sharp turn at high speed, passengers tend to get thrown to one side. This is primarily due to:
[1 Mark]
20.
A rocket works on the principle of conservation of:
[1 Mark]
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