Revise smart, understand Better

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Revise smart, understand Better

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

Your motorboat can move at 30 km/h in still water. How much time will it take you to move 12 km downstream, in a river flowing at 6.0 km/h?

24 min.

30 min.

20 min.

22 min.

If the acceleration vector of an object is directed anti-parallel to the velocity vector:

The object is moving in the negative x-direction.

The object is speeding up.

The object is turning.

The object is slowing down.

When a ball is thrown upward with an initial velocity u at an angle θ to the horizontal, which of these statements about its motion is correct?

Its horizontal acceleration is zero.

The time taken for it to reach the maximum height is (2 usinθ)/g.

Its horizontal velocity is usin?.

Its vertical velocity does not change.

A jumper in the long-jump goes into the jump with a speed of 12 m/s at an angle of 200 above the horizontal. How long is the jumper in the air before returning to the Earth?

0. 21 s.

0.84 s.

0.42 s.

1.3 s.

A plane has an air speed of 200 m/s due North, and is in a wind of 50.0 m/s to the West. The plane's speed relative to the ground is:

206 m/s.

250 m/s.

200 m/s.

150 m/s.