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Dynamics: Newton’s Laws of Motion
ELECTRICITY: Current
ELECTRICITY: Current
ELECTRICITY: Resistance
Elasticity
Electric fields
Electromagnetism
Electromagnetism
Energy: Application And Uses
Experimental physics
Forces
Gravitational fields
Heat
Kinematics in Two Dimensions: Vectors, projectiles
Kinematics in one dimension
Linear Momentum
MOTION
MOTION
MOTION
MOTION
MOTION
MOTION: Circular
MOTION: Collision
MOTION: Inclined plane
MOTION: Simple harmonic motion (SHM)
Magnetism
Optics
PLASTICS
PRESSURE
Radioactivity
TEMPERATURE
The Laws of Thermodynamics
Units System
Units System
Units, dimensions and homogeneity
WAVES: Electromagnetic
WAVES: Electromagnetic
WAVES: Sound
5/36 MCQs for:
Kinematics in Two Dimensions: Vectors, projectiles
A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown?
6.1 m/s.
8.9 m/s.
8.1 m/s.
7.4 m/s.
A rifle bullet is fired at an angle of 300 below the horizontal with an initial velocity of 800 m/s from the top of a cliff 80 m high. How far from the base of the cliff does it strike the level ground below?
130 m.
150 m.
160 m.
140 m.
Ignoring air resistance, the horizontal component of a projectile's velocity:
Continuously decreases.
Continuously increases.
Remains constant.
Is zero.
A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall of the two bullets.
The dropped bullet hits first.
They hit at the same time.
cannot tell without knowing the masses
The fired bullet hits first.
If the acceleration of an object is always directed perpendicular to its velocity:
The object is speeding up.
This situation would not be physically possible.
The object is slowing down.
The object is turning.