Explanation

Explanation

To calculate the velocity attained by the rocket, we can use the equation:

F × t = m × Δv

where:

F = force applied (5 × 10^5 N)

t = time (20 s)

m = mass of the rocket (2 × 10^4 kg)

Δv = change in velocity (final velocity - initial velocity)

Since the rocket starts from rest, the initial velocity is 0. Therefore, Δv = final velocity.

Rearranging the equation to solve for Δv, we get:

Δv = F × t / m

= (5 × 10^5 N) × (20 s) / (2 × 10^4 kg)

= 500 m/s

Explanation

Explanation

These devices use electromagnetic waves, such as radio waves and microwaves, to transmit information.

Electromagnetic waves can travel through the vacuum of space,

Which allows for communication across long distances, even with spacecraft and space agencies

Explanation

Velocity is measured by a speedometer.

It is a device that measures the rate of change of an object's position with respect to time.

It typically measured in units of distance per unit time.

Such as kilometers per hour (km/h) or miles per hour (mph).

Explanation

It is the longest distance covered by the object during projectile motion.

When the angle of projection is 45°, the maximum horizontal range is obtained.

Explanation

Rest and motion are considered relative because they depend on the observer’s frame of reference.

An object may appear to be at rest in one frame and in motion in another.

Explanation

Explanation

Explanation