Answer:
Explanation:
Magnitude of frictional force = μ mg
μ is either static or kinetic friction.
To start the crate moving , static friction is calculated .
a ) To start crate moving , force required = μ mg where μ is coefficient of static friction .
force required =.517 x 56.6 x 9.8 = 286.76 N .
b ) to slide the crate across the dock at a constant speed , force required
= μ mg where μ is coefficient of kinetic friction , where μ is kinetic friction
= .26 x 56.6 x 9.8 = 144.21 N .
Answer:
The correct answer is:
Cardio exercise (B)
Explanation:
The frequency, intensity, time and type (FITT) model is a model is planning exercises that incorporate the four elements to be considered when choosing a personal goal and fitness level. Cardiovascular exercises mainly involves aerobic exercises that are aimed at strengthening the heart and lungs and making the working muscles more efficient at the use of oxygen. They also increase stroke volume (volume of blood pumped per minute) and resting heart rate. The following are what the model entails and how they fit best with cardio exercises:
- Frequency: This has to do with how often exercises will be done. Depending on the goal cardio exercises are normally recommended as moderate exercises for five or more days a week, and intense cardio for three days a week
- Intensity: This has to do with how hard you work during exercises. For cardio exercises, the heart rate monitor, perceived exertion and talk test are done to measure the intensity of the exercise
- Time: This has to do with how long each exercise session will last. For cardio exercises, the recommendation is 30 to 60 minutes for each session.
- Type: This is the actual activity that is chosen during the sessions, and it is chosen to avoid overuse injuries or weight loss plateus. The type of actvities for cardio includes exercises that are aimed at increasing the heart rate, like running, walking, cycling dancing etc.
Hi! i’m really really sorry but i’m answering to get pts. i tried to answer and I hope i’m right, I think A is 784. And B is 294. I’m in 5th grade btw
Let's take the actual question section all by itself:
If an object displaces 40 grams of water, then the buoyant force on the object is equal to the weight of 40 grams of water (Archimedes' principle)... which is equal to the weight of 40 grams of ANY substance.
Weight = (mass) x (gravity)
Weight = (0.040 kg) x (9.8 m/s²)
<em>Weight = 0.392 Newton</em>
so that's the buoyant force acting on the object.
Now, to deal with the first phrase of the question ... everything before the first comma ... you said "100 grams is equal to 1 newton of force". This phrase is really quite meaningless, and there's nothing to be done with it.
A quantity of mass is never "equal to" a force.
Fortunately, whatever this is supposed to mean, it's not needed to answer the rest of the question.
