Answer:
Matching
1-d
2-e
3-a
4-c
5-b.
Fill in the blanks.
6.Levers and inclined planes
7. simple machine
8. Complex machines
9. complex
10. inclined plane
Multiple Choice
11. d
12. b
13. d
Explanation:
The statement above is false. The statement should be: "<span>Gravity is a force of attraction between objects that is due to their masses." Mass and weight are often interchanged. Gravitational force depends on the masses of objects, but the size of this force is what weight is. So the relationship is:
Weight = mass x gravitational constant = mass x 9.81 m/s^2</span>
Answer:
The required frequency = 0.442 Hz
Explanation:
Frequency
where;
Then;
However;
and;
mass
where;
Then;
replacing the values;
Answer:
The time spent in air by the car is 2.19 s
The height of the cliff is 58.5 m
Explanation:
Given;
initial velocity of the car, u = 16 m/s
horizontal distance traveled, R = 35 m
The horizontal distance or range of a projectile is given as;
R = vt
where;
t is the time spent in air by the projectile
t = R/v
t = 35 / 16
t = 2.19 s
The height of the cliff is given as;
h = ut + ¹/₂gt²
h = (16 x 2.19) + ¹/₂(9.8)(2.19)²
h = 58.5 m