Calculate force with speed and mass....

AI Thread Summary
Calculating force in Newtons requires more than just speed and distance; the time of contact between the hand and the ball is also essential. The discussion focuses on estimating the force exerted by a hand on a 3kg ball. Basic kinematics can help determine acceleration if the distance traveled by the hand is known. Without the time parameter, the calculation remains incomplete. Understanding impulse is crucial for accurate force estimation.
Roderich Chenxu
Messages
2
Reaction score
0
Hi forumners, is it possible to calculate force in Newtons given speed and distance? Or if I have to, I would say the ball weighs approximately 3kg?

Capture_2017_01_17_21_56_09.jpg


Thank you in advance.
 
Physics news on Phys.org
Your question is vague. Calculate the force of WHAT?

Zz.
 
Hi ZapperZ, calculating on the force of hand acting on the ball. Is this information enough?
 
Roderich Chenxu said:
Hi ZapperZ, calculating on the force of hand acting on the ball. Is this information enough?

Yes and no. We now know what force to estimate, but if you look at the concept of "Impulse", you'll notice that another parameter needs to be known: the time that the ball is in contact with the hand while it is being pushed. Either this is known, or it needs to be estimated.

Although, I suppose if we apply basic kinematics, we will be able to find the acceleration, given the distance traveled by the hand.

Zz.
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Average velocity as a weighted mean'

Hello everyone, Consider the problem in which a car is told to travel at 30 km/h for L kilometers and then at 60 km/h for another L kilometers. Next, you are asked to determine the average speed. My question is: although we know that the average speed in this case is the harmonic mean of the two speeds, is it also possible to state that the average speed over this 2L-kilometer stretch can be obtained as a weighted average of the two speeds? Best regards, DaTario
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »

Similar threads

Newton's 2nd Law confusion: mass times acceleration is not a force?
Replies
39
Views
3K
B How to characterize a rubber ball moving horizontally and bouncing off of a vertical wall?
Replies
8
Views
2K
I Extending Newton's laws -- Is the concept of force still defined?
Replies
35
Views
4K
Why is a Newton of force .225 pounds?
Replies
4
Views
2K
I Force Required for Gas Struts on 1972 VW T2 Danbury Pop top campervan?
Replies
9
Views
2K
I Rolling ball, change of direction
Replies
3
Views
2K
B Understanding Momentum: The Relationship Between Mass, Velocity, and Force
Replies
29
Views
3K
B What is the Absolute Value of the Normal force on a block on this wedge?
Replies
3
Views
1K
Is true force just "accepted" if it satisfies Newton law?
Replies
6
Views
2K
I Modeling Coulomb Friction for a Moving Point Mass in a Circular Bowl
Replies
20
Views
1K

Hot Threads

Recent Insights

Back
Top