Please show your work!!!! 1) An object of mass 2 kg is thrown straight upward wi
ID: 1333182 • Letter: P
Question
Please show your work!!!!1)
An object of mass 2 kg is thrown straight upward with a velocity of 10 m/s. Neglecting air resistance and taking the acceleration of gravity to be 10 m/s^2
How high does the object go?
a) 5m b) 10m c) 100m d) 200m
2)
A car is traveling at a constant speed of 30 km/hr in a circle of radius 200m. Which of the following is true about the acceleration of the car?
a) It is zero since the speed is constant
b) It is zero since the velocity is constant
c) There is acceleration due to changing velocity
d) The acceleration is negligible due to the radius of the circle.
3)
The gravitational force on Mars is little more than one-third of that on earth. If a basketball player were to jump vertically with the same initial velocity on Mars as she does Earth, then the amount of time taken to reach maximum height would be;
a) 3 times less
b) 3 times more
c) 9 times less
d) 9 times more Please show your work!!!!
1)
An object of mass 2 kg is thrown straight upward with a velocity of 10 m/s. Neglecting air resistance and taking the acceleration of gravity to be 10 m/s^2
How high does the object go?
a) 5m b) 10m c) 100m d) 200m
2)
A car is traveling at a constant speed of 30 km/hr in a circle of radius 200m. Which of the following is true about the acceleration of the car?
a) It is zero since the speed is constant
b) It is zero since the velocity is constant
c) There is acceleration due to changing velocity
d) The acceleration is negligible due to the radius of the circle.
3)
The gravitational force on Mars is little more than one-third of that on earth. If a basketball player were to jump vertically with the same initial velocity on Mars as she does Earth, then the amount of time taken to reach maximum height would be;
a) 3 times less
b) 3 times more
c) 9 times less
d) 9 times more
1)
An object of mass 2 kg is thrown straight upward with a velocity of 10 m/s. Neglecting air resistance and taking the acceleration of gravity to be 10 m/s^2
How high does the object go?
a) 5m b) 10m c) 100m d) 200m
2)
A car is traveling at a constant speed of 30 km/hr in a circle of radius 200m. Which of the following is true about the acceleration of the car?
a) It is zero since the speed is constant
b) It is zero since the velocity is constant
c) There is acceleration due to changing velocity
d) The acceleration is negligible due to the radius of the circle.
3)
The gravitational force on Mars is little more than one-third of that on earth. If a basketball player were to jump vertically with the same initial velocity on Mars as she does Earth, then the amount of time taken to reach maximum height would be;
a) 3 times less
b) 3 times more
c) 9 times less
d) 9 times more
Explanation / Answer
1)
apply V^2 = u^2 +2*a*s
at max height fianl velocity V=0 so max height s= u2 / 2*g
s= 102 /2*9.8 = 5.1020 m
2)
c) There is acceleration due to changing velocity
Explanation =
acentripetal = V2/ r
3) max height s= u2 / 2*g on earth
because u same on both palnet
s on moon = u2 / 2*a = u2 / 2*(g/3) = 3* (u2 / 2*g ) = 3s
b) 3 times more