Dynamics Review. Dynamics Test No. 1. Generator. New Era. Sample Test
1 Draw the resultant forces acting on the bodies.
2 What motion can a body exhibit if it is acted on by two forces as shown in the illustration? Tick the correct answers.
A. The body can remain at rest.
B. The body can accelerate.
C. The body can move uniformly.
D. The body can decelerate.
3 A locomotive moved three wagons in succession on a railway siding.
The locomotive applied the same force to each wagon, but each wagon experienced a different acceleration. Which wagon had the greatest mass?
4 Complete the sentences with the correct phrases.
If two forces of the same magnitude act on a body and the body remains at rest,
then these forces have A/B directions. If the same forces act on two bodies of different masses,
then the body with the smaller mass will accelerate.
A. the same B. opposite C. greater D. less
5 Tick the correct completions. 1. When a car accelerates, inertia causes the passengers to A/ B.
2. When the car turns left, the luggage shifts C/ D.
A. lean forward B. are pressed against the seatbacks C. to the right D. to the left
6 Which figure correctly determines the resultant of the forces acting on the body
shown in the box?
7 How long does it take for a body falling in a vacuum to reach a speed of 90 km/h?
8 An 82 kg worker lifts a load of bricks on a rope suspended from a pulley.
What is the maximum force it can exert?
9 Select the expressions that complete the sentences.
If one body exerts a force on another, then the second body exerts the same force on the first, but in the direction A/ B. These forces are called C/ D forces.
A. perpendicular B. opposite C. action-reaction D. inertia
10 The figure shows a man pulling a box. Draw the friction force vector acting on the box.
1 Draw the resultant forces acting on the bodies.
2 What motion can a body exhibit if it is acted on by two forces as shown in the illustration? Select the correct answers.
A. The body can remain at rest.
B. The body can move with uniform velocity.
C. The body can accelerate.
D. The body can decelerate.
3 A locomotive moved three wagons one after another on a railway siding.
The locomotive applied the same force to each wagon, but each wagon experienced a different acceleration. Which wagon had the greatest mass?
4 Complete the sentences with the correct phrases.
If forces A/B act on a body, it is in uniformly accelerated motion.
A change in the value of the resultant force acting on a moving body causes a change in
C/D.
A. balanced B. unbalanced C. acceleration D. direction of motion.
5 Select the correct completions. 1. When a car brakes, inertia causes the passengers to A/ B.
2. When the car turns right, the luggage shifts C/ D.
A. lean forward B. are pressed against the seatbacks C. to the right D. to the left
6 Which figure correctly determines the resultant of the forces acting on the body
shown in the box?
7 How long does it take a body falling in a vacuum to reach a speed of 54 km/h? ( ... / 3 pts.)
8 A 93 kg worker lifts a load of bricks on a rope suspended from a pulley.
What is the maximum force he can exert?
9 Select the expressions that complete the sentence.
The action force and the reaction force have terms A/ B and C/ D.
A. opposite B. the same C. common point of application D. different points of application
10 In the figure, you can see a boy pushing a wardrobe. Draw the vector for the friction force acting on the boy's foot.