A bowler once measured that she can throw the bowling ball with a speed of 15miles/hour.If it takes 3 seconds from the ball to t
1 answer:
The distance traveled by the ball in feet is 66 ft.
The given parameters;
- speed of the ball, u = 15 miles/hour
- time of motion of the ball, t = 3 seconds
1 mile = 5280 feet
1 hour = 3600 s
The speed of the ball in feet per second is calculated as follows;
The distance traveled by the ball in feet is calculated as follows;
Distance = speed x time
Distance = 22 ft/s x 3 s
Distance = 66 ft
Thus, the distance traveled by the ball in feet is 66 ft.
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Answer:
The speed of the wave with a frequency 100 mhz will be
Explanation:
We have given that frequency of light is 100 mhz
We have to find the speed of light in vaccuum
We know that all electromagnetic waves travels in vaccum wth the same speed as the speed of light
And we know that speed of light is equal to
So the speed of the wave with a frequency 100 mhz will be
Answer:
1) 1.31 m/s2
2) 20.92 N
3) 8.53 m/s2
4) 1.76 m/s2
5) -8.53 m/s2
Explanation:
1) As the box does not slide, the acceleration of the box (relative to ground) is the same as acceleration of the truck, which goes from 0 to 17m/s in 13 s
2)According to Newton 2nd law, the static frictional force that acting on the box (so it goes along with the truck), is the product of its mass and acceleration
3) Let g = 9.81 m/s2. The maximum static friction that can hold the box is the product of its static coefficient and the normal force.
So the maximum acceleration on the block is
4)As the box slides, it is now subjected to kinetic friction, which is
So if the acceleration of the truck it at the point where the box starts to slide, the force that acting on it must be at 136.6 N too. So the horizontal net force would be 136.6 - 108.3 = 28.25N. And the acceleration is
28.25 / 16 = 1.76 m/s2
5) Same as number 3), the maximum deceleration the truck can have without the box sliding is -8.53 m/s2