Answer:
A d-t graph's slope is equivalent to the speed and direction while a v-t graph's slope is equal to its acceleration. A constant slope for a d-t graph means that the speed is constant. The area underneath a v-t graph would be its distance.
Explanation:
Ek (Kinetic Energy) = 1/2m*v^2
0.5x1x30^2
0.5x30^2
= 450J (joules)
Answer:
180 m
Explanation:
Given:
Uniform speed of the car, U = 30 m/s
Uniform acceleration of the motorcycle = 10 m/s²
For the motorcycle to catch up with the car, the distance traveled must be the same.
For the car;
Distance = Speed × Time
⇒ d = u × t
d = 30 × t
d = 30t ......(1)
For the motorcycle;
The stationary police motorcycle has initial speed, u = 0
From equation of motion;
but u = 0
.....(2)
Equating equation (1) and (2)
30t = 5t²
t = 6 seconds
Substituting t = 6 s into equation (2)
d = 5(6)²
d = 5 × 36
d = 180 m
The motorcycle must travel 180 m before it catches up to the car
Answer:150km
Explanation:
A 5-solar-mass black hole has radius to its event horizon to be 15 km, then the radius of the event horizon of a 50-solar-mass black hole will be
5solarmass =15km
50solar mass = x
Cross mutiply
x = 50* 15 / 5
15 x 10 = 150km