Explanation:
Given that,
Displacement in ice block, 
Force exerted by water, 
To find,
Work done by the force during the displacement.
Solve,
We know that the product of force and displacement is called work done. It is also equal to the dot product of force and displacement as :
We know that, i.i = j.j = k.k = 1
So, the work done by the force on the block during the displacement is 4181 Joules.
Answer:
Explanation:
Terry can ride at a speed of
V = 30 miles in 2hours
Speed = distance / time
V = 30 /2
V = 15 mile/hour
So, we want to know the distance traveled in 1.7hours
Then,
Speed = distane / time
Distance = speed × time
Distance =15 × 1.7
Distance = 25.5 miles
So, the distance traveled in 1.7hours is 25.5 miles
120 minutes=2 hours
20/2= 10mph
Answer:
The friction force acting on the object is 7.84 N
Explanation:
Given;
mass of object, m = 4 kg
coefficient of kinetic friction, μk = 0.2
The friction force acting on the object is calculated as;
F = μkN
F = μkmg
where;
F is the frictional force
m is the mass of the object
g is the acceleration due to gravity
F = 0.2 x 4 x 9.8
F = 7.84 N
Therefore, the friction force acting on the object is 7.84 N
