To solve this problem, we can use the equation of motion: v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.

Given in the problem:
u = 15 km/h (initial velocity)
t = 0.5 hours (time)

We need to find v (final velocity).

However, we don't have the acceleration (a). We can find it using the equation of motion: s = ut + 0.5at^2, where s is the displacement.

Given in the problem:
s = 45 km (displacement)

Substituting the given values into the equation:

45 = 15*0.5 + 0.5*a*(0.5)^2

Solving for a, we get:

a = 140 km/h^2

Now, we can substitute u, a, and t into the first equation to find v:

v = 15 + 140*0.5

v = 15 + 70

v = 85 km/h

None of the options match the calculated answer. There might be a mistake in the problem or the options provided.

Question

To solve this problem, we can use the equation of motion: v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.

Given in the problem:
u = 15 km/h (initial velocity)
t = 0.5 hours (time)

We need to find v (final velocity).

However, we don't have the acceleration (a). We can find it using the equation of motion: s = ut + 0.5at^2, where s is the displacement.

Given in the problem:
s = 45 km (displacement)

Substituting the given values into the equation:

45 = 15*0.5 + 0.5*a*(0.5)^2

Solving for a, we get:

a = 140 km/h^2

Now, we can substitute u, a, and t into the first equation to find v:

v = 15 + 140*0.5

v = 15 + 70

v = 85 km/h

None of the options match the calculated answer. There might be a mistake in the problem or the options provided.

Knowee AI · Accepted Answer