Answer:
(a) W = 70 lb-ft (b) 94.85 J
Explanation:
Given that,
A student lifts a 10.0 pound ball 7.00 feet in 7.00 seconds.
(a) We need to find the work done.
Work done = Force × displacement
i.e.
W = 10 × 7
W = 70 lb-ft
(b) We know that,
1 lb-foot = 1.355 J
50 lb-ft = (70 × 1.355) J
= 94.85 J
Hence, this is the required solution.
Can anyone explain what the effects of positive and negative camber, toe angle, and caster on front-wheel-drive, rear-wheel drive, all-wheel drive, and 4 wheel drive cars, trucks, and SUVs are? Please include examples.
A positive camber is good for keeping a recreational vehicle stable, while the negative camber is better for allowing high performance vehicles to have a better ability to turn corners faster and accurately. The toe angle affects directional control, turning response and tire tread life. Toe-related tread wear will cause a "feathering" wear pattern across the tread. If too much toe-in is present, the feathering will angle toward the center of the vehicle. Increasing the amount of positive caster will increase steering effort and straight line tracking, as well as improve high speed stability and cornering effectiveness. Positive caster also increases tire lean when cornering (almost like having more negative camber) as the steering angle is increased.
Shane's 100-watt radio draws 7 amps of current on a 120-volt circuit. What is the resistance in the radio?
Answer:
Resistance, R = 2.04 Ohms.
Explanation:
Given the following data;
Current = 7 amps
Circuit voltage = 120 Volts
Power = 100 Watts
To find the resistance;
First of all, we would calculate the potential difference (voltage level) used by the radio.
Power = current * voltage
100 = 7 * voltage
Voltage = 100/7
Voltage = 14.29 Volts
Next, we solve for the resistance of the radio;
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = IR[/tex]
Where;
V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.
Substituting into the formula, we have;
[tex] 14.29 = 7*R[/tex]
[tex] R = \frac {14.29}{7} [/tex]
Resistance, R = 2.04 Ohms.
What’s the answer to this problem?
Answer:
answer is B I hope it helps
Imagine that you are the architect that designed the school. Identify five safety hazards that should be included in the design of the school; that is safety measures that must be included in the design of the school making it safe to students and teachers and all other persons that will use the school.
Answer:
Access for physically disabled students and staff, fire hazards / fire escape hazards for stairs and elevators, emergency escapes...and that's all I can think of.