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3 years ago

1. The resultant force on a ball is not zero. What will happen to the ball? *

Physics

1 answer:

Tju [1.3M]3 years ago

7 0

Answer:

it will more and change direction

Explanation:

because the resultant force (R) is not equal zero so may be there is a force greater than the other one and the ball will more in the direction of greater force.

and it can't be remain stationary because R=! 0 .

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A cart loaded with bricks has a total mass of 20.4 kg and is pulled at constant speed by a rope. The rope is inclined at 26.1 ◦

Readme [11.4K]

Answer:

Normal force, N = 154.5 N

Explanation:

Given that,

Total mass of the cart, m = 20.4 kg

Angle of inclination, $\theta=26.1^{\circ}$

Distance moved, d = 20.1 m

The coefficient of kinetic friction between ground and cart is 0.6

The value of acceleration due to gravity, $g=9.8\ m/s^2$

Let N is the normal force exerted on the cart by the floor. It is given by :

$N=mg-T\ sin\theta$

$T\ cos\theta=\mu N$

$T\ cos\theta=\mu (mg-T\ sin\theta)$

$T\ cos(26.1)=0.6 (20.4\times 9.8-T\ sin(26.1))$

T = 103.23 N

So, the normal force is :

$N=20.4\times 9.8-103.23\ sin(26.1)$

N = 154.5 N

So, the normal force exerted on the cart by the floor is 154.5 N. Hence, this is the required solution.

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3 years ago

An Olympic runner completes the 200-meter sprint in 23 seconds. What is the runnerâ€™s average speed? (Round your answer to the

Amanda [17]

The average speed of the runner is 8.7m/s.

Therefore, Option C) 8.7m/s is the correct answer.

Given the data in the question;

Distance covered; $d = 200m$

Time taken; $t = 23s$

Average speed; $s = \ ?$

Speed is the rate at which an object covers a certain distance. It is expressed as:

$s = \frac{d}{t}$

Where s is speed, d is distance and t is time taken.

We substitute our given distance into the equation

$s = \frac{200m}{23s} \\\\s = 8.6956m/s\\\\s = 8.7m/s$

The average speed of the runner is 8.7m/s

Therefore, Option C) 8.7m/s is the correct answer.

Learn more: brainly.com/question/21503615

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2 years ago

Jennifers bowling ball is dropped from rest. Janets bowling ball is thrown horizontally at the same time. After the balls are re

Pachacha [2.7K]

They both have a constant acceleration of g (9.8 m/s) So they both have equal accelerations. This is according to the law of gravity

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4 years ago

Read 2 more answers

A truck travels due east for a distance of 1.9 km, turns around and goes due west for 8.7 km, and finally turns around again and

Hatshy [7]

Answer:

a) Total distance travelled = 1.9km + 8.7km + 3.0km = 13.6km

b) Total displacement = -1.9km + 8.7km-3.0km=+3.8km

Total displacement = 3.8km due west

Explanation:

a) Total distance travelled is a scalar quantity it is not affected by the direction it's only concerned with the magnitude.

Total distance travelled = 1.9km + 8.7km + 3.0km = 13.6km

b) Total displacement is a vector quantity it takes into consideration both magnitude and direction.

Taking west as positive and east as negative.

Total displacement = -1.9km + 8.7km-3.0km = +3.8km

Total displacement = 3.8km due west

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4 years ago

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4 years ago