WorksheetsGP1_Finals_Review
Total questions: 20
Worksheet time: 19mins
1. What will be the acceleration of a 35 kg cart if a net force of 150 N is applied to it while at rest?
4.29 m/s2
525 m/s2
8.46 m/s2
5.33 m/s2
Work is a vector quantity.
TRUE
FALSE
A 18kg box is being pushed across a concrete floor with a force of 455 N. What is the acceleration of the crate? Assume coefficient of kinetic friction is 0.21.
12.15m/s2
32.56 m/ss
23.28 m/s2
15.81 m/s2
What would be the equation of the force acting upon a sliding object in an inclined plane, if the inclined plane is has 0.08 coefficient of kinetic friction?
F = ukmgcosθ
F = mgcosθ-ukmgsinθ
F = mgsinθ-ukmgcosθ
F = ukmgcosθ
What is the velocity of a 2800 kg car whose KE is 87 kJ?
7.88 m/s
9.25 m/s
11.24 m/s
4.57 m/s
What is the work done by a 300-watt generator working in in 10 minutes?
218 kJ
135 kJ
45 kJ
180 kJ
Which situation does not demonstrates a work done?
a box being lifted
man holding a barbell in the air
waiter cleaning a table
a boy pushing a cart
How much power is developed by a car that moves at 25 m/s when its engine exerts 1.99 x 104 N?
498 kW
387 kW
549 kW
351 kW
What is the momentum of a 0.55 kg ball moving at 25 cm/s?
2.33 kgm/s
1.25 kgm/s
0.24 kgm/s
0.14 kgm/s
Two objects m1 and m2, are strapped on a pulley with a rope. m1=2.45kg and m2=1.27 kg. What is the equation to be used to find the system’s acceleration?
a = (m1g – m2g)/(m2- m1)
a = (m1g – m2g)/(m2+ m1)
a = (m2g – m1g)/(m2+ m1)
a = (m2g – m1g)/(m2- m1)
A 0.75kg box is hang on both ends making an angle of 25° on one end and 33° on another, both from the horizontal line. If the string from 25° generates a tension of 13.5N, what is the value of tension of the second string?
11.6 N
14.6 N
15.2 N
13.8 N
A 0.15 kg object rolling at 0.8 m/s has greater momentum than a 0.50 kg object moving at 0.2 m/s.
False, both has the same momentum
True, the first object has greater momentum
False, the second object has greater momentum
In an inclined pulley, m1 lies on the surface of the inclined plane while m2 is hanged on the other side. If the angle of inclination of an inclined plane is θ, which is the correct equation for acceleration, if m2 > m1?
a= (m2gsinθ – m1g)/(m2 + m1)
a= (m1gsinθ – m2g)/(m2 + m1)
a= (m2g– m1gsinθ)/(m2 + m1)
a= (m1g– m2gsinθ)/(m2 + m1)
A 10 kg box is pushed across a horizontal surface with a constant force of 50 N. The coefficient of kinetic friction between the box and the surface is 0.3. What is the acceleration of the box?
2.0 m/s²
2.7 m/s²
3.5 m/s²
5.0 m/s²
What is the work required to raise a 80 kg barbell to a height of 1.75m?
1 372 J
1 458 J
2 456 J
3 234 J
A block of mass 10 kg is lifted vertically by a pulley system with an acceleration of 2 m/s². What is the tension in the rope?
95 N
118 N
78 N
100 N
Which of the following statements about a frictional force is correct?
Friction always opposes motion.
Friction depends only on the weight of the object.
Friction is independent of the surface area in contact.
Friction is always proportional to the velocity of the object.
A 20 kg box slides down a frictionless inclined plane that makes an angle of 30∘ with the horizontal. What is the acceleration of the box?
9.8 m/s2
4.9m/s2
5.2 m/s2
2.5 m/s2
Why does increasing the angle of an inclined plane reduce the force needed to push an object up?
The object's weight decreases.
The normal force on the object increases.
The gravitational force parallel to the plane decreases.
The force is distributed over a longer distance.
A block slides down a rough inclined plane with a constant velocity. What can be inferred about the forces acting on the block?
Gravity is greater than friction.
Friction is greater than gravity.
Friction is equal to the component of gravity parallel to the incline.
No forces are acting on the block.
